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 ...

Sibling conflicts over the care of elderly parents are quite common, along with disputes over estates and inheritance. Whether it’s disagreements on how much effort a sibling contributes, financial ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Aself-described “family-ologist,” New York Times Magazine staff writer Susan Dominus writes in her new ...

If you’ve ever watched a pair of siblings laughing over an inside joke, backing each other up at the dinner table, or navigating life with the seamless shorthand of best friends, you might assume it’s ...

Earlier this year, on New Year's Day, Emma Trenchard was on holiday in Cape Town, South Africa. She was visiting her older brother and his family, and they were out to lunch at a cafe. "We were just ...