Thursday, February 28, 2013

You are a Christian, aren't you, son ?

EINSTEIN:
You are a Christian, aren't you, son ?

 Einstein on Religion

The word God is the product of human weakness
In January of 1954, just a year before his death, Albert Einstein wrote the following letter to philosopher Erik Gutkind after reading his book, "Choose Life: The Biblical Call to Revolt," and made known his views on religion. Apparently Einstein had only read the book due to repeated recommendation by their mutual friend Luitzen Egbertus Jan Brouwer. The letter was bought at auction in May 2008, for £170,000; unsurprisingly, one of the unsuccessful bidders was Richard Dawkins.

Translated transcript follows.  (Source: David Victor; Image: Albert Einstein, via.)



Translated Transcript
Princeton, 3. 1. 1954

Dear Mr Gutkind,

Inspired by Brouwer's repeated suggestion, I read a great deal in your book, and thank you very much for lending it to me. What struck me was this: with regard to the factual attitude to life and to the human community we have a great deal in common. Your personal ideal with its striving for freedom from ego-oriented desires, for making life beautiful and noble, with an emphasis on the purely human element. This unites us as having an "unAmerican attitude."

Still, without Brouwer's suggestion I would never have gotten myself to engage intensively with your book because it is written in a language inaccessible to me. The word God is for me nothing more than the expression and product of human weakness, the Bible a collection of honorable, but still purely primitive, legends which are nevertheless pretty childish. No interpretation, no matter how subtle, can change this for me. For me the Jewish religion like all other religions is an incarnation of the most childish superstition. And the Jewish people to whom I gladly belong, and whose thinking I have a deep affinity for, have no different quality for me than all other people. As far as my experience goes, they are also no better than other human groups, although they are protected from the worst cancers by a lack of power. Otherwise I cannot see anything "chosen" about them.

In general I find it painful that you claim a privileged position and try to defend it by two walls of pride, an external one as a man and an internal one as a Jew. As a man you claim, so to speak, a dispensation from causality otherwise accepted, as a Jew the privilege of monotheism. But a limited causality is no longer a causality at all, as our wonderful Spinoza recognized with all incision, probably as the first one. And the animistic interpretations of the religions of nature are in principle not annulled by monopolization. With such walls we can only attain a certain self-deception, but our moral efforts are not furthered by them. On the contrary.

Now that I have quite openly stated our differences in intellectual convictions it is still clear to me that we are quite close to each other in essential things, i.e; in our evaluations of human behavior. What separates us are only intellectual "props" and "rationalization" in Freud's language. Therefore I think that we would understand each other quite well if we talked about concrete things.

With friendly thanks and best wishes,

Yours, 

A. Einstein


Islam Explained in Layman's Terms 

Here is a perspective by Dr. Peter Hammond.    Dr. Hammond's doctorate is in Theology.
He was born in Capetown in 1960, grew up in Rhodesia and converted to Christianity in 1977.
Adapted from Dr. Peter Hammond's book: Slavery, Terrorism and Islam: The Historical Roots and Contemporary Threat:

Islam is not a religion, nor is it a cult. In its fullest form, it is a complete, total, 100% system of life.

Islam has religious, legal, political, economic, social, and military components. The religious component is a beard for all of the other components.

Islamization begins when there are sufficient Muslims in a country to agitate for their religious privileges.

When politically correct, tolerant, and culturally diverse societies agree to Muslim demands for their religious privileges, some of the other components tend to creep in as well..

Here's how it works:

As long as the Muslim population remains around or under 2% in any given country, they will for the most part be regarded as a peace-loving  minority, and not as a threat to other citizens.
This is the case in:

United States -- Muslim 0..6%
Australia -- Muslim 1.5%
Canada -- Muslim 1.9%
China -- Muslim 1.8%
Italy -- Muslim 1.5%
Norway -- Muslim 1.8%

At 2% to 5%, they begin to proselytize from other ethnic minorities and disaffected groups, often with major recruiting from the jails and among street gangs.
This is happening in:

Denmark -- Muslim 2%
Germany -- Muslim 3.7%
United Kingdom -- Muslim 2.7%
Spain -- Muslim 4%
Thailand -- Muslim 4.6%

From 5% on, they exercise an inordinate influence in proportion to their percentage of the population.
For example, they will push for the introduction of halal (clean by Islamic standards) food, thereby securing food preparation jobs for Muslims.
They will increase pressure on supermarket chains to feature halal on their shelves -- along with threats for failure to comply.

This is occurring in:

France -- Muslim 8%
Philippines -- 5%
Sweden -- Muslim 5%
Switzerland -- Muslim 4.3%
The Netherlands -- Muslim 5.5%
Trinidad & Tobago -- Muslim 5.8%

At this point, they will work to get the ruling government to allow them to rule themselves (within their ghettos) under Sharia, the Islamic Law.
The ultimate goal of Islamists is to establish Sharia law over the entire world.

When Muslims approach 10% of the population, they tend to increase lawlessness as a means of complaint about their conditions.
In Paris, we are already seeing car-burnings.
Any non Muslim action offends Islam, and results in uprisings and threats, such as in Amsterdam , with opposition to Mohammed cartoons and films about Islam.
Such tensions are seen daily, particularly in Muslim sections, in:

Guyana -- Muslim 10%
India -- Muslim 13.4%
Israel -- Muslim 16%
Kenya -- Muslim 10%
Russia -- Muslim 15%

After reaching 20%, nations can expect hair-trigger rioting, jihad militia formations, sporadic killings, and the burnings of Christian churches and Jewish synagogues, such as in:

Ethiopia -- Muslim 32.8%

At 40%, nations experience widespread massacres, chronic terror attacks, and ongoing militia warfare, such as in:

Bosnia -- Muslim 40%
Chad -- Muslim 53.1%
Lebanon -- Muslim 59.7%

From 60%, nations experience unfettered persecution of non-believers of all other religions (including non-conforming Muslims), sporadic ethnic cleansing (genocide), use of Sharia Law as a weapon, and Jizya, the tax placed on infidels, such as in:

Albania -- Muslim 70%
Malaysia -- Muslim 60.4%
Qatar -- Muslim 77.5%
Sudan -- Muslim 70%

After 80%, expect daily intimidation and violent jihad, some State-run ethnic cleansing, and even some genocide, as these nations drive out the infidels, and move toward 100% Muslim, such as has been experienced and in some ways is on-going in:

Bangladesh -- Muslim 83%
Egypt -- Muslim 90%
Gaza -- Muslim 98.7%
Indonesia -- Muslim 86.1%
Iran -- Muslim 98%
Iraq -- Muslim 97%
Jordan -- Muslim 92%
Morocco -- Muslim 98.7%
Pakistan -- Muslim 97%
Palestine -- Muslim 99%
Syria -- Muslim 90%
Tajikistan -- Muslim 90%
Turkey -- Muslim 99..8%
United Arab Emirates -- Muslim 96%

100% will usher in the peace of 'Dar-es-Salaam' -- the Islamic House of Peace.
Here there's supposed to be peace, because everybody is a Muslim, the Madrasses are the only schools, and the Koran is the only word, such as in:

Afghanistan -- Muslim 100%
Saudi Arabia -- Muslim 100%
Somalia -- Muslim 100%
Yemen -- Muslim 100%

Unfortunately, peace is never achieved, as in these 100% states the most radical Muslims intimidate and spew hatred, and satisfy their blood lust by killing less radical Muslims, for a variety of reasons.

'Before I was 9 I had learned the basic canon of Arab life. It was me against my brother; me and my brother against our father; my family against my cousins and the clan; the clan against the tribe; the tribe against the world, and all of us against the infidel. -- Leon Uris, 'The Haj'

It is important to understand that in some countries, with well under 100% Muslim populations, such as France, the minority Muslim populations live in ghettos, within which they are 100% Muslim, and within which they live by Sharia Law.
The national police do not even enter these ghettos.
There are no national courts, nor schools, nor non-Muslim religious facilities.
In such situations, Muslims do not integrate into the community at large.
The children attend madrasses.
They learn only the Koran.
To even associate with an infidel is a crime punishable with death.
Therefore, in some areas of certain nations, Muslim Imams and extremists exercise more power than the national average would indicate.

Today's 1.5 billion Muslims make up 22% of the world's population.
But their birth rates dwarf the birth rates of Christians, Hindus, Buddhists, Jews, and all other believers.
Muslims will exceed 50% of the world's population by the end of this century.

Adapted from Dr. Peter Hammond's book: Slavery, Terrorism and Islam: The Historical Roots and Contemporary Threat 

Tuesday, February 26, 2013

Future evidence for extraterrestrial life might come from dying stars

Even dying stars could host planets with life—and if such life exists, we might be able to detect it within the next decade. This encouraging result comes from a new theoretical study of Earth-like planets orbiting white dwarf stars. Researchers found that we could detect oxygen in the atmosphere of a white dwarf's planet much more easily than for an Earth-like planet orbiting a Sun-like star.

"In the quest for extraterrestrial biological signatures, the first stars we study should be white dwarfs," said Avi Loeb, theorist at the Harvard-Smithsonian Center for Astrophysics (CfA) and director of the Institute for Theory and Computation. When a star like the Sun dies, it puffs off its outer layers, leaving behind a hot core called a white dwarf. A typical white dwarf is about the size of Earth.

It slowly cools and fades over time, but it can retain heat long enough to warm a nearby world for billions of years. Since a white dwarf is much smaller and fainter than the Sun, a planet would have to be much closer in to be habitable with liquid water on its surface. A habitable planet would circle the white dwarf once every 10 hours at a distance of about a million miles.

Read more at: http://bit.ly/13MAdKF
Image credit: David A. Aguilar
HIDDEN MICRO-CONTINENT FOUND IN THE INDIAN OCEAN 

Beneath the islands of Reunion and Mauritius lies a hitherto undiscovered microcontinent. The continental fragment Mauritia is believed to have detached about 60 million years ago, while Madagascar and India were drifting apart. The fragment was hidden under huge masses of lava.

Continental break-up is usually associated with mantle plumes, which is where giant blobs of hot rock rise from the mantle, intruding tectonic plates until the plates break apart at the hot spots. The ancient supercontinent Gondwana began to break apart in this fashion about 184 Mya (million years ago). This break up was accompanied by massive eruptions of basalt lava, when East Gondwana (Antarctica, Madagascar, India and Australia), started to separate from Africa. About 130 Mya South America started drifting westward from Africa and the South Atlantic Ocean; this resulted in open marine conditions by 110 Mya. About 120 Mya East Gondwana began to separate, as India started moving northward.

Mantle plumes currently underneath the islands of Marion and Reunion may well have played a role in the formation of the Indian Ocean. If the zone of the rupture is situated at the edge of a landmass, then fragments of the land may separate off; the Seychelles are a prime example of this. 

A team of geoscientists from Norway, South Africa, Britain and Germany studied lava sand grains from the Mauritius beach. Their study suggested there were more continental fragments. The sand grains contained zircons aged between 660 and 1970 million years; the lava carried these zircons when it pushed through subjacent continental crust of the same age.

This dating method was supplemented by recalculating the hotspot trail. This showed the position of the plates relative to the two hotspots at the time of rupture, and also showed that the continent fragments continued to wander over the Reunion plume; this explained how they were covered with volcanic rock. What had previously been thought of as the trail of the Reunion hotspot turned out to be continent fragments. This research suggests micro-continents occur ore frequently than previously realised. 

The coloured track (left colour scale) west of Reunion in the image is the calculated movement of the Reunion hotspot. The black lines with yellow circles and the red circle indicate the corresponding calculated track on the African plate and the Indian plate, respectively. The numbers in the circles are ages in millions of years. The areas with topography just below the sea surface are now regarded as continental fragments.

-TEL

http://www.gfz-potsdam.de/portal/gfz/Public+Relations/Pressemitteilungen/aktuell/130224_Mauritia;jsessionid=5025B9C7341A54D4B5DB8C3C2714C008?template=gfz
Trond H. Torsvik, Hans Amundsen, Ebbe H. Hartz, Fernando Corfu, Nick Kusznir, Carmen Gaina, Pavel V. Doubrovine, Bernhard Steinberger, Lewis D. Ashwal, Bjørn Jamtveit. A Precambrian microcontinent in the Indian Ocean. Nature Geoscience, 2013; DOI:10.1038/NGEO1736

Image: © GFZ/Steinberger
 Image: © GFZ/Steinberger
HIDDEN MICRO-CONTINENT FOUND IN THE INDIAN OCEAN

Beneath the islands of Reunion and Mauritius lies a hitherto undiscovered microcontinent. The continental fragment Mauritia is believed to have detached about 60 million years ago, while Madagascar and India were drifting apart. The fragment was hidden under huge masses of lava.

Continental break-up is usually associated with mantle plumes, which is where giant blobs of hot rock rise from the mantle, intruding tectonic plates until the plates break apart at the hot spots. The ancient supercontinent Gondwana began to break apart in this fashion about 184 Mya (million years ago). This break up was accompanied by massive eruptions of basalt lava, when East Gondwana (Antarctica, Madagascar, India and Australia), started to separate from Africa. About 130 Mya South America started drifting westward from Africa and the South Atlantic Ocean; this resulted in open marine conditions by 110 Mya. About 120 Mya East Gondwana began to separate, as India started moving northward.

Mantle plumes currently underneath the islands of Marion and Reunion may well have played a role in the formation of the Indian Ocean. If the zone of the rupture is situated at the edge of a landmass, then fragments of the land may separate off; the Seychelles are a prime example of this.

A team of geoscientists from Norway, South Africa, Britain and Germany studied lava sand grains from the Mauritius beach. Their study suggested there were more continental fragments. The sand grains contained zircons aged between 660 and 1970 million years; the lava carried these zircons when it pushed through subjacent continental crust of the same age.

This dating method was supplemented by recalculating the hotspot trail. This showed the position of the plates relative to the two hotspots at the time of rupture, and also showed that the continent fragments continued to wander over the Reunion plume; this explained how they were covered with volcanic rock. What had previously been thought of as the trail of the Reunion hotspot turned out to be continent fragments. This research suggests micro-continents occur ore frequently than previously realised.

The coloured track (left colour scale) west of Reunion in the image is the calculated movement of the Reunion hotspot. The black lines with yellow circles and the red circle indicate the corresponding calculated track on the African plate and the Indian plate, respectively. The numbers in the circles are ages in millions of years. The areas with topography just below the sea surface are now regarded as continental fragments.

-TEL

http://www.gfz-potsdam.de/portal/gfz/Public+Relations/Pressemitteilungen/aktuell/130224_Mauritia;jsessionid=5025B9C7341A54D4B5DB8C3C2714C008?template=gfz
Trond H. Torsvik, Hans Amundsen, Ebbe H. Hartz, Fernando Corfu, Nick Kusznir, Carmen Gaina, Pavel V. Doubrovine, Bernhard Steinberger, Lewis D. Ashwal, Bjørn Jamtveit. A Precambrian microcontinent in the Indian Ocean. Nature Geoscience, 2013; DOI:10.1038/NGEO1736

Monday, February 25, 2013

A new study suggests a species of lantern shark uses its glowing spines to avoid being eaten, possibly making it the first fish to use bioluminescence to actively avoid predation.

Bioluminescence is common in the deep sea, where the velvet belly lantern shark (Etmopterus spinax) lives. Some deep sea fish use their light to hide their presence from predators, such as disguising their silhouette from below with an illuminated belly, while others like the angler fish use it to lure prey. It was known that this lantern shark produces light from its underside, but the photophores lining its spines had escaped detection until this study. These spines, positioned in front of each of the two dorsal fins, would make it a painful meal.

It seems paradoxical - why hide yourself from below, but advertise yourself from the side and above? The team behind this study believe it communicates to any would-be predators that this shark will be a very painful meal. The brightness of this spines is perfectly tailored to both predator and prey. Visual modelling experiments revealed potential predators could see the shark from several metres away, but its prey (typically the pearlside fish) couldn't see it until it was 1.5 metres away - severely reducing their chance of a successful escape.

To read the paper: http://bit.ly/Zmmtpm

Photo credit: Dr. Jérôme Mallefet FNRS - UCL.

http://www.bbc.co.uk/news/science-environment-21531532

http://www.livescience.com/27290-glowing-shark-spines.html

http://www.the-scientist.com/?articles.view%2FarticleNo%2F34488%2Ftitle%2FSharks-Glow-to-Frighten-Predators%2F
A new study suggests a species of lantern shark uses its glowing spines to avoid being eaten, possibly making it the first fish to use bioluminescence to actively avoid predation.

Bioluminescence is common in the deep sea, where the velvet belly lantern shark (Etmopterus spinax) lives. Some deep sea fish use their light to hide their presence from predators, such as disguising their silhouette from below with an illuminated belly, while others like the angler fish use it to lure prey. It was known that this lantern shark produces light from its underside, but the photophores lining its spines had escaped detection until this study. These spines, positioned in front of each of the two dorsal fins, would make it a painful meal.

It seems paradoxical - why hide yourself from below, but advertise yourself from the side and above? The team behind this study believe it communicates to any would-be predators that this shark will be a very painful meal. The brightness of this spines is perfectly tailored to both predator and prey. Visual modelling experiments revealed potential predators could see the shark from several metres away, but its prey (typically the pearlside fish) couldn't see it until it was 1.5 metres away - severely reducing their chance of a successful escape.

To read the paper: http://bit.ly/Zmmtpm

Photo credit: Dr. Jérôme Mallefet FNRS - UCL.

http://www.bbc.co.uk/news/science-environment-21531532

http://www.livescience.com/27290-glowing-shark-spines.html

http://www.the-scientist.com/?articles.view%2FarticleNo%2F34488%2Ftitle%2FSharks-Glow-to-Frighten-Predators%2F

Friday, February 22, 2013

Bad news guys... size does matter. Well, if you're a Hottentot golden mole, that is.

The Hottentot golden mole (Amblysomus hottentotus) makes its home in sub-Saharan Africa, where it lives in a network of tunnels feeding on earthworms and insect larvae. They are polygamous and the female is able to mate all year round, allowing males and females to reproduce whenever they meet. But given that Hot
tentot moles are blind, how do females determine the quality of a mate?

The evidence suggests they judge him according to his penis length. All Hottentot golden moles have small penises relative to their size (while a male measures between 74-97mm long, its penis will be in the range of 1.2-2.5mm in length). But there is great variation in length between males - much more variation than in other body dimensions - which is a strong sign of sexual selection.

"The basic role of a penis is to put sperm as close to the site of fertilisation as possible, and perhaps to get it as far ahead of sperm of other males as possible," said Bill Bateman (University of Pretoria, South Africa). "Therefore it makes sense for males to invest, in the evolutionary sense, in big or long penises." For example, if a mole is a poor hunter he would not have the energy to invest in growing a long penis, and then female could tell he was not a great candidate for high-quality offspring.

Photo credit: Justin Nicolau.

http://www.bbc.co.uk/nature/21321171

http://www.wired.co.uk/news/archive/2013-02/21/golden-mole-penis-size-matters

http://www.the-scientist.com/?articles.view%2FarticleNo%2F34477%2Ftitle%2FPenis-Size-Matters-for-Golden-Moles%2F
Bad news guys... size does matter. Well, if you're a Hottentot golden mole, that is.

The Hottentot golden mole (Amblysomus hottentotus) makes its home in sub-Saharan Africa, where it lives in a network of tunnels feeding on earthworms and insect larvae. They are polygamous and the female is able to mate all year round, allowing males and females to reproduce whenever they meet. But given that Hottentot moles are blind, how do females determine the quality of a mate?

The evidence suggests they judge him according to his penis length. All Hottentot golden moles have small penises relative to their size (while a male measures between 74-97mm long, its penis will be in the range of 1.2-2.5mm in length). But there is great variation in length between males - much more variation than in other body dimensions - which is a strong sign of sexual selection. 

"The basic role of a penis is to put sperm as close to the site of fertilisation as possible, and perhaps to get it as far ahead of sperm of other males as possible," said Bill Bateman (University of Pretoria, South Africa). "Therefore it makes sense for males to invest, in the evolutionary sense, in big or long penises." For example, if a mole is a poor hunter he would not have the energy to invest in growing a long penis, and then female could tell he was not a great candidate for high-quality offspring. 

Photo credit: Justin Nicolau.

http://www.bbc.co.uk/nature/21321171

http://www.wired.co.uk/news/archive/2013-02/21/golden-mole-penis-size-matters

http://www.the-scientist.com/?articles.view%2FarticleNo%2F34477%2Ftitle%2FPenis-Size-Matters-for-Golden-Moles%2F

Thursday, February 21, 2013

Is evolution fairly predictable? A new study with E. coli suggests yes, forming the same solutions for the same problems in different populations.

Researchers started the experiment with 3 populations of E. coli. The bacteria in each population were generalists, competing for two different foods: glucose and acetate. After 1,200 generations, each population had split into two types, each specialised physiologically to either glucose or acetate. After analysing bacteria at 16 points over its evolution, the team found significant similarity in the changes that had occurred.

"In all three populations it seems to be more or less the same core set of genes that are causing the two phenotypes that we see... In a few cases, it's even the exact same genetic change," Matthew Herron (University of Montana) said. “There are about 4.5 million nucleotides in the E. coli genome. Finding in four cases that the exact same change had happened independently in different populations was intriguing.”

The team suggested that one particular form of selection, negative frequency dependence, played an important part. As the population of one type of specialised bacteria increases the amount of resources for them will decrease, giving bacteria who specialise in the alternate food an advantage.

Of course, there are important counterpoints. Bacteria such as E. coli produce asexually, so it may not be wise to extrapolate from these findings how sexually-reproducing organisms evolve. The large populations of bacteria may make their evolution more predictable than that of more dispersed species. The E. coli populations were also evolving in a stable environment, which could have an effect on any predictability.

To read the paper: http://bit.ly/12QFjdc

Photo credit: Mattosaurus, 2009.

http://www.nature.com/news/predictable-evolution-trumps-randomness-of-mutations-1.12459

http://www.sciencedaily.com/releases/2013/02/130219172155.htm

http://www.redorbit.com/news/science/1112788202/e-coli-bacteria-evolution-genome-prediction-022013/

http://www.eurekalert.org/pub_releases/2013-02/uobc-eod021213.php
Is evolution fairly predictable? A new study with E. coli suggests yes, forming the same solutions for the same problems in different populations.

Researchers started the experiment with 3 populations of E. coli. The bacteria in each population were generalists, competing for two different foods: glucose and acetate. After 1,200 generations, each population had split into two types, each specialised physiologically to either glucose or acetate. After analysing bacteria at 16 points over its evolution, the team found significant similarity in the changes that had occurred.

"In all three populations it seems to be more or less the same core set of genes that are causing the two phenotypes that we see... In a few cases, it's even the exact same genetic change," Matthew Herron (University of Montana) said. “There are about 4.5 million nucleotides in the E. coli genome. Finding in four cases that the exact same change had happened independently in different populations was intriguing.”

The team suggested that one particular form of selection, negative frequency dependence, played an important part. As the population of one type of specialised bacteria increases the amount of resources for them will decrease, giving bacteria who specialise in the alternate food an advantage.

Of course, there are important counterpoints. Bacteria such as E. coli produce asexually, so it may not be wise to extrapolate from these findings how sexually-reproducing organisms evolve. The large populations of bacteria may make their evolution more predictable than that of more dispersed species. The E. coli populations were also evolving in a stable environment, which could have an effect on any predictability. 

To read the paper: http://bit.ly/12QFjdc

Photo credit: Mattosaurus, 2009. 

http://www.nature.com/news/predictable-evolution-trumps-randomness-of-mutations-1.12459

http://www.sciencedaily.com/releases/2013/02/130219172155.htm

http://www.redorbit.com/news/science/1112788202/e-coli-bacteria-evolution-genome-prediction-022013/

http://www.eurekalert.org/pub_releases/2013-02/uobc-eod021213.php

Wednesday, February 20, 2013

Anyone in or going to the tangled mass of humanity that is the East Coast of the USA? The Harvard Museum of Natural History has a world-class permanent exhibit called EVOLUTION which, "invites visitors to examine the fossil, anatomical and genetic evidence that all life is connected through a shared evolutionary history." The exhibit also features a behind-the-scenes look at current evolutionary biology work being done by Harvard. But that's not all they have: there is also a nice exhibit on the evolution of arthropods, and a number of other neat zoological and ecological exhibits. Go learn something!!!

Below is a link to a selection of research videos featured in the EVOLUTION exhibit.

http://www.hmnh.harvard.edu/lectures-classes-events/assembling-the-tree-of-life.html

Tuesday, February 19, 2013

If you believe in both science and religion, you are not doing either properly

If you believe in both science and religion, you are not doing either properly
Giant Water Bugs, Part 2: Mating and Parental Care.

Reproducing is a complicated process for giant water bugs. Unlike the vast majority of animals (excluding fish), it's the male water bugs who provide care. The strategies used to care for the eggs vary between the two sub-families: while the Belostomatinae sub-family are back brooders, carrying their eggs around with them, the other sub-family Lethocerinae guard their eggs by staying with them where they are laid.

Both strategies protect the eggs (e.g. from infanticide, as female water bugs are known to destroy the egg clutches of other females) and help them survive by keeping them moist and oxygenated. Back brooders tend to keep near the surface, sometimes surfacing where oxygen is more available. Other times they do "push-ups" underwater, which keeps fresher water flowing over the eggs.

Lethocerinae eggs are laid above the surface, meaning they have plenty of oxygen but are in danger of drying out. The male prevents this by climbing up to the eggs (he keeps an eye on them from underwater) and lets water drip off him onto his offspring. In some species, males regurgitate water onto the eggs.

Because of all this effort - it takes between 1 and 3 weeks of this care for the eggs to hatch - males want to be sure the eggs are theirs. But the females can store sperm from previous encounters, which is a not a good thing for males. So the male insists they mate maybe 3 times (at least), then he'll let her lay some eggs. Then they'll mate another few times, and she can lay a few more. It's not unknown for them to have sex 50 times before the male is satisfied, taking perhaps six hours. All these matings make it unlikely any of the eggs will be sired by another male, as anyone else's sperm will struggle to fertilize eggs when there's so much of his.

Sometimes though, you've got to look after Number One. When food is scarce males may eat the eggs of other water bugs, sometimes even their own. This also occurs when something has gone wrong with the eggs, such as faulty development, and the male cuts his losses and tries to get some of the energy he's invested back.

Photo: Left - Water bug (genus: Lethocerus) guarding its eggs (credit to Hyla 2009). Right - Water bug (genus: Abedus) carrying its eggs on its back (credit to Greg Mayberry).

Sources and further reading:
http://www.zoo.org/page.aspx?pid=1920#.USJroaWR68A

http://thedragonflywoman.com/2011/11/07/giant-water-bug-mating/

http://thedragonflywoman.com/2009/10/02/gwbparents/

Alcock, J. (2009). Animal Behaviour. Massachusetts: Sinauer Associates.

http://thedragonflywoman.com/2011/09/02/friday-5-fun-facts-about-giant-water-bugs/
Giant Water Bugs, Part 2: Mating and Parental Care.

Reproducing is a complicated process for giant water bugs. Unlike the vast majority of animals (excluding fish), it's the male water bugs who provide care. The strategies used to care for the eggs vary between the two sub-families: while the Belostomatinae sub-family are back brooders, carrying their eggs around with them, the other sub-family Lethocerinae guard their eggs by staying with them where they are laid.

Both strategies protect the eggs (e.g. from infanticide, as female water bugs are known to destroy the egg clutches of other females) and help them survive by keeping them moist and oxygenated. Back brooders tend to keep near the surface, sometimes surfacing where oxygen is more available. Other times they do "push-ups" underwater, which keeps fresher water flowing over the eggs. 

Lethocerinae eggs are laid above the surface, meaning they have plenty of oxygen but are in danger of drying out. The male prevents this by climbing up to the eggs (he keeps an eye on them from underwater) and lets water drip off him onto his offspring. In some species, males regurgitate water onto the eggs.

Because of all this effort - it takes between 1 and 3 weeks of this care for the eggs to hatch - males want to be sure the eggs are theirs. But the females can store sperm from previous encounters, which is a not a good thing for males. So the male insists they mate maybe 3 times (at least), then he'll let her lay some eggs. Then they'll mate another few times, and she can lay a few more. It's not unknown for them to have sex 50 times before the male is satisfied, taking perhaps six hours. All these matings make it unlikely any of the eggs will be sired by another male, as anyone else's sperm will struggle to fertilize eggs when there's so much of his. 

Sometimes though, you've got to look after Number One. When food is scarce males may eat the eggs of other water bugs, sometimes even their own. This also occurs when something has gone wrong with the eggs, such as faulty development, and the male cuts his losses and tries to get some of the energy he's invested back. 

Photo: Left - Water bug (genus: Lethocerus) guarding its eggs (credit to Hyla 2009). Right - Water bug (genus: Abedus) carrying its eggs on its back (credit to Greg Mayberry). 

Sources and further reading:
http://www.zoo.org/page.aspx?pid=1920#.USJroaWR68A

http://thedragonflywoman.com/2011/11/07/giant-water-bug-mating/

http://thedragonflywoman.com/2009/10/02/gwbparents/

Alcock, J. (2009). Animal Behaviour. Massachusetts: Sinauer Associates. 

http://thedragonflywoman.com/2011/09/02/friday-5-fun-facts-about-giant-water-bugs/
Godless small things
The discovery of a microscopic world shook the foundations of theology and created modern demons
by Philip Ball

When the Dutch cloth merchant Antonie van Leeuwenhoek looked at a drop of pond water through his home-made microscope in the 1670s, he didn’t just see tiny ‘animals’ swimming in there. He saw a new world: too small for the eye to register yet teeming with invisible life. The implications were theological as much as they were scientific.

Invisibility comes in many forms, but smallness is the most concrete. Light ignores very tiny things rather as ocean waves ignore sand grains. During the 17th century, when the microscope was invented, the discovery of such objects posed a profound problem: if we humans were God’s ultimate purpose, why would he create anything that we couldn’t see?

The microworld was puzzling, but also wondrous and frightening. There was nothing especially new about the idea of invisible worlds and creatures — belief in immaterial spirits, angels and demons was still widespread. But their purpose was well understood: they were engaged in the Manichean struggle for our souls. If that left one uneasy in a universe where there was more than meets the eye, at least the moral agenda was clear.

Read at http://bit.ly/WKVcN0
Image: 'The greatness of nature, and the subtle and unspeakable care with which she works, is a source of unending contemplation'. A Mayfly nymph. Photo by Daniel Stoupin, microworldsphotography.com
Godless small things
The discovery of a microscopic world shook the foundations of theology and created modern demons
by Philip Ball

When the Dutch cloth merchant Antonie van Leeuwenhoek looked at a drop of pond water through his home-made microscope in the 1670s, he didn’t just see tiny ‘animals’ swimming in there. He saw a new world: too small for the eye to register yet teeming with invisible life. The implications were theological as much as they were scientific.

Invisibility comes in many forms, but smallness is the most concrete. Light ignores very tiny things rather as ocean waves ignore sand grains. During the 17th century, when the microscope was invented, the discovery of such objects posed a profound problem: if we humans were God’s ultimate purpose, why would he create anything that we couldn’t see?

The microworld was puzzling, but also wondrous and frightening. There was nothing especially new about the idea of invisible worlds and creatures — belief in immaterial spirits, angels and demons was still widespread. But their purpose was well understood: they were engaged in the Manichean struggle for our souls. If that left one uneasy in a universe where there was more than meets the eye, at least the moral agenda was clear.

Read at http://bit.ly/WKVcN0
Image: 'The greatness of nature, and the subtle and unspeakable care with which she works, is a source of unending contemplation'. A Mayfly nymph. Photo by Daniel Stoupin, microworldsphotography.com

Monday, February 18, 2013

YouTube - Videos from this email
Drug residue in rivers is significantly changing fish behaviour, making them bolder, more aggressive and anti-social.

When medications are taken, they are excreted from the body and flow (via the sewer) to a water treatment plant. Treatment plants are not designed to test and break down these chemicals, however, and so they end up in bodies of water such as rivers and lakes. The organisms living in these areas become surrounded by traces of our drugs.

This new study looked at the effects of oxazepam, one of a group of anti-anxiety drugs called benzodiazepines. The team (of Umeå University, Sweden) found that European Perch exposed to similar levels of oxazepam as they would experience in their natural environment changed their behaviour drastically. They were less afraid to venture into new areas, generally swam away from other perch and were quicker to eat zooplankton (their usual food).

This result shows how our drugs could severely change ecosystems. Leaving its school is a risky move for perch as they're more likely to be targeted by a predator. In addition perch eat zooplankton, which eat algae - if the perch deplete zooplankton populations too much, algae populations soar. The balance of the ecosystem could be greatly disrupted.

Oxazepam is not the first drug shown to alter fish behaviour. Other example include Prozac (which reduces fathead minnow reaction times) and ibuprofen, which decreases courtship behaviour in zebrafish. The team say the solution is not to stop ill people taking medication, but to improve treatment plants and so prevent contamination of water systems. More research is also important, both with our current drugs and identifying possible damage of a potential drug.

Photo credit: Biopix/JC Schou.

http://www.nature.com/news/anti-anxiety-drug-found-in-rivers-makes-fish-more-aggressive-1.12434

http://www.rsc.org/chemistryworld/2013/02/perch-fish-anxiety-drugs-benzodiazepines-behaviour-changes

http://phys.org/news/2013-02-fish-bolder-gluttonous-drug-residue.html

http://www.bbc.co.uk/news/science-environment-21437404
Drug residue in rivers is significantly changing fish behaviour, making them bolder, more aggressive and anti-social. 

When medications are taken, they are excreted from the body and flow (via the sewer) to a water treatment plant. Treatment plants are not designed to test and break down these chemicals, however, and so they end up in bodies of water such as rivers and lakes. The organisms living in these areas become surrounded by traces of our drugs.

This new study looked at the effects of oxazepam, one of a group of anti-anxiety drugs called benzodiazepines. The team (of Umeå University, Sweden) found that European Perch exposed to similar levels of oxazepam as they would experience in their natural environment changed their behaviour drastically. They were less afraid to venture into new areas, generally swam away from other perch and were quicker to eat zooplankton (their usual food).

This result shows how our drugs could severely change ecosystems. Leaving its school is a risky move for perch as they're more likely to be targeted by a predator. In addition perch eat zooplankton, which eat algae - if the perch deplete zooplankton populations too much, algae populations soar. The balance of the ecosystem could be greatly disrupted.

Oxazepam is not the first drug shown to alter fish behaviour. Other example include Prozac (which reduces fathead minnow reaction times) and ibuprofen, which decreases courtship behaviour in zebrafish. The team say the solution is not to stop ill people taking medication, but to improve treatment plants and so prevent contamination of water systems. More research is also important, both with our current drugs and identifying possible damage of a potential drug.

Photo credit: Biopix/JC Schou.

http://www.nature.com/news/anti-anxiety-drug-found-in-rivers-makes-fish-more-aggressive-1.12434

http://www.rsc.org/chemistryworld/2013/02/perch-fish-anxiety-drugs-benzodiazepines-behaviour-changes

http://phys.org/news/2013-02-fish-bolder-gluttonous-drug-residue.html

http://www.bbc.co.uk/news/science-environment-21437404

Of the Nature of Things, by Titus Lucretius Carus

Of the Nature of Things, by Titus Lucretius Carus

Sunday, February 17, 2013

Saguaro Cactus fast facts:

-Pronounced ‘suh-WAH-ro’

-Its proper name, Carnegiea gigantea, was an homage to philanthropist Andrew Carnegie.

-It is only found in the Sonoran Desert. They are heavily concentrated in southern Arizona and northern Mexico in Sonora. Few are found in California.

-Arms will not grow off of the trunk until it is about 15 feet tall, which takes approximately 75 years. The tallest on record was 78 feet tall, and was likely over 200 years old.

-The root system is shallow, stabilized more by rocks than soil, and the average saguaro holds about 200 gallons of water.

-Holes in saguaros are not always a sign of disease. More often than not, it is due to a Gila woodpecker looking for a drink.

-The saguaro bloom is the official state flower of Arizona. Though it is not endangered, saguaros are heavily protected by state law against humans damaging or removing the cactus without a permit.

For more information: http://www.bbc.co.uk/nature/life/Saguaro

http://www.desertmuseum.org/kids/oz/long-fact-sheets/Saguaro%20Cactus.php

http://www.nps.gov/sagu/naturescience/saguaro_threats.htm

Photo credit: Greg Vaughn: http://gregvaughn.photoshelter.com/
Saguaro Cactus fast facts:

-Pronounced ‘suh-WAH-ro’

-Its proper name, Carnegiea gigantea, was an homage to philanthropist Andrew Carnegie.

-It is only found in the Sonoran Desert. They are heavily concentrated in southern Arizona and northern Mexico in Sonora. Few are found in California.

-Arms will not grow off of the trunk until it is about 15 feet tall, which takes approximately 75 years. The tallest on record was 78 feet tall, and was likely over 200 years old.

-The root system is shallow, stabilized more by rocks than soil, and the average saguaro holds about 200 gallons of water.

-Holes in saguaros are not always a sign of disease. More often than not, it is due to a Gila woodpecker looking for a drink.

-The saguaro bloom is the official state flower of Arizona. Though it is not endangered, saguaros are heavily protected by state law against humans damaging or removing the cactus without a permit.

For more information: http://www.bbc.co.uk/nature/life/Saguaro

http://www.desertmuseum.org/kids/oz/long-fact-sheets/Saguaro%20Cactus.php

http://www.nps.gov/sagu/naturescience/saguaro_threats.htm

Photo credit: Greg Vaughn: http://gregvaughn.photoshelter.com/

Science's 10 Greatest Unsolved Mysteries - YouTube

Science's 10 Greatest Unsolved Mysteries - YouTube
In the image, frogs a, b and c are all different morphs of the same species, Ranitomeya imitator, commonly known as the Imitating Dart Frog. The different morphs mimic the colouration and pattern of other dart frogs that occur in their geographic range. The frog which each morph is imitating is depicted directly below the morph itself (i.e. frogs d, e and f). But why do the Imitating Dart Frogs do this? The answer is Müllerian mimicry.

Müllerian mimicry is when multiple unpalatable* species resemble each other. In general, these species have common predators. By imitating each other’s warning signals, their predators will quickly learn to avoid both species. This is most commonly observed amongst invertebrates, such as butterflies. This is a rare example of a vertebrate exhibiting Müllerian mimicry.

*unpalatable – inedible/ foul-tasting organisms

Read all about it: http://bit.ly/SOL3P8
Image: http://bit.ly/VXKghY
In the image, frogs a, b and c are all different morphs of the same species, Ranitomeya imitator, commonly known as the Imitating Dart Frog. The different morphs mimic the colouration and pattern of other dart frogs that occur in their geographic range. The frog which each morph is imitating is depicted directly below the morph itself (i.e. frogs d, e and f). But why do the Imitating Dart Frogs do this? The answer is Müllerian mimicry.

Müllerian mimicry is when multiple unpalatable* species resemble each other. In general, these species have common predators. By imitating each other’s warning signals, their predators will quickly learn to avoid both species. This is most commonly observed amongst invertebrates, such as butterflies. This is a rare example of a vertebrate exhibiting Müllerian mimicry.

*unpalatable – inedible/ foul-tasting organisms

Read all about it: http://bit.ly/SOL3P8
Image: http://bit.ly/VXKghY

Saturday, February 16, 2013

We all know that this past Thursday was Valentine’s Day, and many of you may still be cashing in this weekend, trying to steal a smooch from your sweetie. Have you ever wondered why kissing is seen as a sign of affection? What is it about pressing your lips against the lips of someone else that is so desirable? Romantic kissing has been documented as far back as 4,000 years in human history, though not all human cultures kiss. Other Great Apes also kiss to express joy. But, were did it come from?

Some scientists believe that kissing is a learned behavior, stemming from mothers who would chew food up and feed it to their young. This mouth-to-mouth contact was associated with pleasant feelings, which may have led to its persistence in our species. Others speculate that even nursing could have been enough to stimulate the lips and create that linkage. Our lips are also uniquely suited for kissing, as they are much more sensitive than other animals, and pucker outwards to make kissing easier.

Additionally, the proximity of kissing brings pheromones into play. Females typically prefer scents dissimilar to their own, indicating genetic diversity, which is advantageous for the offspring. Females are also more sensitive to oral health, and are much more likely to refuse a partner based on bad breath, as it is an indicator of the male’s overall health.

Kissing also releases dopamine, a neurotransmitter responsible for happy feelings, to the same center of the brain that is most affected by highly addictive drugs, such as heroin and cocaine. This explains why people can get lovesick, and have feelings of withdrawals when his or her mate is missing.

For more information: http://news.discovery.com/history/history-of-kissing-130214.htm#mkcpgn=rssnws1

http://discovermagazine.com/2011/jan-feb/20-things-you-didnt-know-about-kissing#.UR-76aE9Dv6

Photo credit: eHarmony.com
We all know that this past Thursday was Valentine’s Day, and many of you may still be cashing in this weekend, trying to steal a smooch from your sweetie. Have you ever wondered why kissing is seen as a sign of affection? What is it about pressing your lips against the lips of someone else that is so desirable? Romantic kissing has been documented as far back as 4,000 years in human history, though not all human cultures kiss. Other Great Apes also kiss to express joy. But, were did it come from?

Some scientists believe that kissing is a learned behavior, stemming from mothers who would chew food up and feed it to their young. This mouth-to-mouth contact was associated with pleasant feelings, which may have led to its persistence in our species. Others speculate that even nursing could have been enough to stimulate the lips and create that linkage. Our lips are also uniquely suited for kissing, as they are much more sensitive than other animals, and pucker outwards to make kissing easier.

Additionally, the proximity of kissing brings pheromones into play. Females typically prefer scents dissimilar to their own, indicating genetic diversity, which is advantageous for the offspring. Females are also more sensitive to oral health, and are much more likely to refuse a partner based on bad breath, as it is an indicator of the male’s overall health.

Kissing also releases dopamine, a neurotransmitter responsible for happy feelings, to the same center of the brain that is most affected by highly addictive drugs, such as heroin and cocaine. This explains why people can get lovesick, and have feelings of withdrawals when his or her mate is missing.

For more information: http://news.discovery.com/history/history-of-kissing-130214.htm#mkcpgn=rssnws1

http://discovermagazine.com/2011/jan-feb/20-things-you-didnt-know-about-kissing#.UR-76aE9Dv6

Photo credit: eHarmony.com
Do you love Orcas?

You should, but if you don't its probably because you are a seal. Orcazine, an all things Orca and Orca research blog has produced a very nice poster which they are selling and suggesting for use in classrooms. I would suggest at least checking it out online for free to learn more about the biological, anthropological-related, and behavioral aspects of Orcas!

http://orcazine.com/orcazine-presents-educational-orca-poster/
Do you love Orcas?

You should, but if you don't its probably because you are a seal.  Orcazine, an all things Orca and Orca research blog has produced a very nice poster which they are selling and suggesting for use in classrooms. I would suggest at least checking it out online for free to learn more about the biological, anthropological-related, and behavioral aspects of Orcas!

http://orcazine.com/orcazine-presents-educational-orca-poster/

Reclaim your mind - Terence McKenna - YouTube

Reclaim your mind - Terence McKenna - YouTube
No one likes a love rat, and it's not only humans that change their behaviour when cheating to avoid discovery. New research shows gelada baboons do it too!

Gelada baboons (Theropithecus gelada) live in social groups of about a dozen females and fewer males. Each group is lead by a dominant male who has mating privileges with all the females. Subordinate males are not allowed to mate with his "harem" and typically hang around the edges of the group. However, genetic research reveals these subordinate males can father nearly 20% of the group's young. They can't be hiding to mate - they live in open grassland, with nothing to hide behind - so how are they getting away with it?

The answer lies in tactical deception. When gelada baboons mate, both male and female emit loud calls (heard more than 30 metres away). Cheating baboons keep quiet. In 1000 pairings, the cheating baboons were much quieter, making less sexual noises. These pairings usually took place over 20 metres away from the dominant baboon.

However, it's not a flawless strategy. The team found a fifth of subordinate male-female pairings were interrupted by an angry dominant male, who tried to bite or hurt them. He doesn't mate with her afterwards, he just doesn't like anyone else mating with his females. Unfortunately for him this punishment doesn't have a lasting effect, as subordinate males quickly go back to their cheating ways.

Photo credit: frankfocus.com

http://phys.org/news/2013-02-secret-rendezvous-geladas-conceal-monkeying.html

http://www.livescience.com/27046-gelada-baboons-hide-sexual-infidelity.html
No one likes a love rat, and it's not only humans that change their behaviour when cheating to avoid discovery. New research shows gelada baboons do it too!

Gelada baboons (Theropithecus gelada) live in social groups of about a dozen females and fewer males. Each group is lead by a dominant male who has mating privileges with all the females. Subordinate males are not allowed to mate with his "harem" and typically hang around the edges of the group. However, genetic research reveals these subordinate males can father nearly 20% of the group's young. They can't be hiding to mate - they live in open grassland, with nothing to hide behind - so how are they getting away with it?

The answer lies in tactical deception. When gelada baboons mate, both male and female emit loud calls (heard more than 30 metres away). Cheating baboons keep quiet. In 1000 pairings, the cheating baboons were much quieter, making less sexual noises. These pairings usually took place over 20 metres away from the dominant baboon. 

However, it's not a flawless strategy. The team found a fifth of subordinate male-female pairings were interrupted by an angry dominant male, who tried to bite or hurt them. He doesn't mate with her afterwards, he just doesn't like anyone else mating with his females. Unfortunately for him this punishment doesn't have a lasting effect, as subordinate males quickly go back to their cheating ways.

Photo credit: frankfocus.com

http://phys.org/news/2013-02-secret-rendezvous-geladas-conceal-monkeying.html

http://www.livescience.com/27046-gelada-baboons-hide-sexual-infidelity.html