A recipe for growing bigger hearts, found in the blood of pythons

In comic books, many superheroes have gained extraordinary powers after being transfused with the (often modified or irradiated) blood of animals. But, as so often happens, life proves stranger than fiction. At the University of Colorado, Boulder, a group of mice have grown bigger hearts after scientists injected them… » 10/30/11 8:45am 10/30/11 8:45am