Evolution

A hormone has been discovered that significantly increases the number of pancreatic beta cells in mice. This is interesting because these beta cells are responsible for the production of the hormone insulin, insulin is one of the hormones responsible for regulation of blood glucose levels in humans and an inability to produce insulin is a form of diabetes. This new hormone has been named betatrophin and is found in humans. In the event that a treatment is developed from this newly discovered hormone, it could become an excellent way of combating some forms of diabetes.

http://news.sciencemag.org/sciencenow/2013/04/could-new-liver-hormone-treat-di.html?ref=em