Fascination with twins and what twin studies tell us about human nature is universal. There is no question that behavioral and medical science advances have happened largely because twins yield a ...

From uncanny coincidences to shared biology, we asked the experts to explain the real forces behind the phenomenon. Twins sit near Lake Geneva in Lausanne, Switzerland. Studies suggest that the ...

Twins may often make you imagine two babies with the exact physical features, such as eyes, smile, and even voice. However, this is not the case with every twin, as some look totally different from ...