Welcome to Amy Alkon's HumanLab: The Science Between Us, a weekly show with the luminaries of behavioral science. =Join us tonight as twins researcher Dr. Nancy Segal tells fascinating stories about twins and explains what her research on twins has to tell us about how we come to be the people we are. Some of the questions she'll answer: •How much do our genes determine who we are? •Can we shift our environment to make the best of the genes we have? •Where do our personalities come from? •Why are some sisters so different from one another? •How much does having rotten parents affect your chances for success? •Why do some abused children grow up to be criminals and why do some become productive individuals? Dr. Segal has a brand new book, just out, Twin Mythconceptions: False Beliefs, Fables, and Facts About Twins. It's fascinating and entertaining and busts every myth out there about twins.Join me and all my fascinating guests every Sunday, 7-8 p.m. PT, 10-11 p.m. ET, at blogtalkradio.com/amyalkon or subscribe on iTunes or Stitcher.Support the show (and change your life!) by buying my "science-help" book, "Unf*ckology: A Field Guide to Living with Guts and Confidence."