A viral TikTok video showcases the surprising effects of a twin pressing against their ... told Newsweek: "I see babies born with crooked noses and misshapen heads from the birthing process ...

Identical twins are not as identical as previously assumed, according to a study published today (January 7) in Nature Genetics. Rather than having exactly the same DNA sequences, twins start ...

The authors suggested that the mutation might have arisen in one twin and was passed to the other in the womb through a shared placenta.