Aaron Wilson is an award-winning Texans and NFL reporter for KPRC 2 and www.click2houston.com. He has covered the NFL since 1997, including previous stints for The Houston Chronicle and The Baltimore ...
Twins are pretty rare, accounting for just 3% of births in the U.S. these days. But new research shows that for primates 60 million years ago, giving birth to twins was the norm.