Articles on Twin studies

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Are space twin Scott and Earth twin Mark no longer identical? Robert Markowitz/NASA

Does a year in space make you older or younger?

Before sending humans to Mars or the moon, scientists need to understand what long-term space living does to the human body. Now results are coming in from the Kelly brothers in the TWINS Study,
The microbes that live in our gut are essential to good health. Alpha Tauri 3D Graphics/SHutterstock.com

The key to our humanity isn’t genetic, it’s microbial

The effort to edit the genes of Chinese twins implies that all our traits are determined by our genes. But changing our diet, environment, lifestyle and microbes may have a greater effect.

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