My little sister is my best friend. My mother often compares us to the March sisters from Little Women, and whenever we get together for family events or holidays, we spend the entire time in a corner ...

About half of U.S. adults with a sibling are very or extremely close to at least one, with closeness and support varying by demographics.

If this sounds familiar, you aren’t being immature – you are experiencing adult sibling rivalry, a phenomenon rooted in ...

Sibling dynamics play a profound role in shaping a child’s character. When brothers and sisters are expected to share household responsibilities, they gain more than practical skills, they develop ...

I’m the oldest child. I make the rules,” read a mug my family owned when I was small. “I’m the middle child. I am the reason ...

From braiding hair to playing a sport to solving tricky math equations, siblings can teach each other a lot about the world. In a recent study published in the Journal of Cognition and Development, ...