How Did Human Brains Get to Be so Big?
Posted from Scientific American
In a study published last October, Fedrigo, Wray, Wall and colleagues tested the tradeoff hypothesis and pinpointed changes in two groups of molecules that may have shuttled more energy to our brains, and less to our muscles. “This is the first time the hypothesis has been tested at the molecular level,” Wray told attendees at the 2011 meeting of the American Association for the Advancement of Science.





