A sample of 4,013 participants from 24 countries were asked about aggression toward siblings and non-sibs, to determine ...

In short, they're always the center of attention, and you're always presented as "the inadequate one." "Siblings of ...

Dear Eric: Recently I decided not to attend a holiday gathering with family members I’ve joined for decades, and instead ...

A new study suggests humans belong in an elite “league of monogamy,” ranking closer to beavers and meerkats than to chimpanzees. By comparing full and half siblings across species and human cultures, ...

Growing up as the eldest child often comes with extra responsibilities—which can shape the way you parent your own kids.

Dear Abby is written by Abigail Van Buren, also known as Jeanne Phillips, and was founded by her mother, Pauline Phillips.

Beluga whales avoid inbreeding by switching partners over time, helping a small, isolated population stay genetically healthy ...

Ever wonder how childhood trauma follows us into adult relationships? Shame and self-blame can shape behaviors, and healing ...

Still, the baby's first "gut laugh" is one of the greatest sounds in the world. It's hard not to belt out a little chuckle of your own when you hear something so innocent and joyous. If those dogs ...

Becoming estranged from a sibling can be devastating, even when it also brings a sense of relief. Here's why it happens, and ...

My years of teaching have taught me that behind every student’s behavior is a desire to feel like they belong. Trump is ...

In the icy waters of Alaska's Bristol Bay, a new study reveals how a small population of beluga whales (Delphinapterus leucas ...