A study involving identical twins showed the astonishing differences after one had a lot more sun exposure over their ...

Several sets of identical twins went on a meat vs vegan diet to test the results, and there's plenty that happened afterwards ...

Social-emotional development in twins depends on the attachment they share with each other and their parents. Friendships ...

How rare is it for elephants to birth twins? Find out more about this occurrence in the wild and why it's significant.

Twins have been rare in human history and for that reason can seem special. Many cultures associate twins with health and ...

A new study reveals that developmental differences strongly influence dominance roles in twin relationships, with typically ...