Animals Have Learned to Manipulate the Genetic Lottery

As scientists learn more and more about genetics, humans become increasingly nervous about our ability to basically engineer a child to be exactly the way we want (which is a quiet girl, duh). But it turns out that our mammal brethren have actually been picking the sex of their babies in the animal kingdom for a long… » 7/11/13 2:20pm 7/11/13 2:20pm