Brothers Hugo and Ross Turner spent 12 weeks dining on drastically different meals all in the name of science.

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

The Cavinder twins, who are living it up in Hawaii as the Miami Hurricanes prepare for two games, posted a TikTok video that celebrates their different personalities. In the video, they experienced ...

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

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

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