What’s so special about Twins?

What’s the timing in the womb that leaves some twins  conjoined? Where did the idea of evil twins and doppelgängers come about? And how does facial recognition technology work when you look so alike? Will and Gabe answer some of your biggest questions about twins. Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htm And to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices