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 ...

The Science Siblings love an at-home experiment. Paige and Adam Jacobson went the chemistry route with this one, concocting “elephant toothpaste.” Start by adding the food coloring to the hydrogen ...

Eighty percent of U.S. children have a sibling. Siblings can be sources of companionship, play, and joy—as well as jealousy, rivalry, and aggression. A national survey found that one-third of U.S.

Forbes contributors publish independent expert analyses and insights. I write about relationships, personality, and everyday psychology. Most of us like to think we’ve outgrown our childhood roles. We ...

Birth order has long been linked to differences in cognition, with firstborn children often outperforming their later-born siblings. Parental engagement and interaction have been suggested as ...

It’s been frigid outside, but Paige and Adam Jacobson decided to make it even colder in their “lab.” The Science Siblings experimented with liquid nitrogen. They explained that liquid nitrogen is ...

Sibling rivalry might not unique to humans. New scientific research shows that baboon siblings in southern Africa also feel jealousy toward each other. Sibling rivalry can be intense between young ...

Many children and adolescents have caregiving responsibilities for their siblings. Parents often rely on sibling caregivers to supervise, nurture, and teach their siblings, prepare meals, and ensure ...