What do an Olympic triathlete, a bestselling novelist, and a healthcare entrepreneur have in common — besides a shared family tree? That’s the question New York Times journalist Susan Dominus set out ...

Sibling caretaking can alleviate families’ childcare demands and promote children’s positive development, but it can also be ...

It is not a huge surprise when siblings are alike. Think music prodigies, chess whizzes, star athletes. Some traits that siblings share, though, are so unusual they reveal something about what makes ...

You squint at your TikTok feed. Surely that blonde-haired duo with identical noses are siblings … but that's a pretty intimate hand on the lower back … so dating? We understand that genetics play a ...

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 ...