After more than 50 years of research, scientists still don't know exactly what causes autism. But the data make clear that ...

Twins have long been studied to understand autism causes. — -- When Jenn Medvin asked her daughter, Avery, what she wanted to be as an adult, the 6-year-old gave a range of answers from doctor to ...

These side-by-side photos show identical twins Sam and John Fetters. On the left, the twins on their first day of third grade; on the right, the brothers at home on Martha's Vineyard in March 2024.

The Science of Siblings is a new series exploring the ways our siblings can influence us, from our money and our mental health all the way down to our very molecules. We'll be sharing these stories ...

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Sam and John Fetters are identical twins with autism. But Sam is in college, while John still struggles to form sentences. Their experience may... These identical twins both grew up with autism, but ...