When scientists studied more than 100 sets of identical twins who grew up apart, results showed that although they weren’t raised together, they were still incredibly alike. These twins all had similar personalities, attitudes, temperaments and interests!

Rocket science


Scientific research and discovery can often require a control group and a test group. Sets of twins are the perfect control and test subjects, as they share so many attributes. In fact, scientists once sent a twin to the International Space Station (ISS) for 340 days to monitor how his body changed compared to his twin brother back on Earth. Among the findings were a big difference in gene activity for the twin in space, the development of thicker skin on his forehead and a slightly different eyeball shape.

Social network


Twins first interact with one another inside their mother’s womb. They’ve even been observed stroking the head and back of their sibling in utero. 

Out of print


Although identical twins share the same genetics, they do not share the same fingerprints. However, their identical genes do give them similar patterns. 

Double talk


Cryptophasia is a phenomenon where twins create a unique language to communicate with each other, usually as children. This secret language cannot be understood by anyone else!