Study Explains Why We're Not All Beautiful By Andrea Thompson LiveScience Staff Writer posted: 28 March 2007 09:47 am ET A new study explains why we aren't all born with Brad Pitt’s perfectly chiseled features or Angelina Jolie’s pouty lips. A long-standing thorn in the side of biologists has been the difficulty in accounting for the enormous variation between individuals when sexual selection by females for the most attractive mates should quickly spread the “best” genes through a population. “It is a major problem for evolutionary biology,” said study team leader Marion Petrie of Newcastle University. The lek paradox For...