Add Yahoo as a preferred source to see more of our stories on Google. A team of neuroscientists was "really surprised" by the results of a gene-editing experiment on hamsters. The team expected that ...

A group of researchers made gene-edited hamsters that were meant to be less aggressive. The researchers used CRISPR, a gene-editing platform, to remove a gene they believed was responsible for ...

What causes some individuals to act out violently when provoked, while others turn the other cheek? For decades, psychologists, criminologists, and sociologists (among others) have tried to understand ...

Toxic masculinity is a major societal concern. It is said that testosterone from the testes makes men overly aggressive. But the biology of hormones and aggression is not that simple. A symposium ...