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 ...

Modern research echoes Adler’s theses. In simple terms, siblings differentiate themselves to reduce direct competition. If ...

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 ...

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 ...

Researchers are finding that the impact of relationships with siblings —for better or worse — can be important, and endure well beyond childhood. How Sibling Bonds Shape Our Lives If you ever wondered ...