Twins don't share everything

Twins carry different flags on their DNA, even from birth

By Stephen Ornes, 13:51 PM July 31, 2012

It's often difficult to tell identical twins apart. They can sound alike and look alike. It's particularly confusing when they wear the same clothes. But scientists have now identified one way in which these twins always differ.

In a new study, biologists investigated the genes of newborn twins. They found that it’s here that young siblings begin to go their separate ways. The newly identified differences aren't actually in the babies’ genes but in molecules attached to those genes. Those...

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