Mary-Kate and Ashley Olsen. Fred and George Weasley. Tia and Tamera Mowry. Let's face it — society loves twins, and so do we. But most people don't even know the coolest facts about twins, so let's find out! We bet you didn't know about most of these interesting tidbits . . . unless you're a twin.
15 Interesting Facts That You May Not Know About Twins
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