60 Minutes explores sexual orientation, March 12

The Sunday, March 12, installment of the CBS newsmagazine 60 Minutes will feature Lesley Stahl examining "The Science of Sexual Orientation." Factors from twins to siblings to prenatal circumstances will be explored as scientists continue to look for scientific reasoning behind why some people are gay and some aren't. 60 Minutes airs at 7 p.m. Eastern/Pacific; for more information, visit www.CBSNews.com.