In addition to his brother Dylan, who is just four years younger than the 'High School Musical' star, Zac Efron has an adorable little brother and sister Alexandra Schonfeld is a staff editor at ...

Jason Bateman reveals why he and sister Justine don’t see each other often - not because of conflict, but because their connection is more adult-friend than traditional sibling closeness.

Most siblings know exactly how to push each other’s buttons as kids, but the real challenge arises when this behavior carries over into adulthood. Do you ever notice that no matter how much you feel ...

While sibling rivalry often captures more attention, it is the moments of sibling revelry that truly fortify familial bonds and contribute to psychological well-being. Sibling relationships are among ...

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 ...

Parents try everything to influence their children. But new research suggests brothers and sisters have their own profound impact. Credit...Artwork by Kensuke Koike Supported by By Susan Dominus Susan ...

The Science of Siblings is a 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 over ...