Like humans, mice will compete over territory and mates, and show increased confidence in their fighting skills the more they win. At first, a brain chemical called dopamine is essential for young ...

LAS VEGAS – Magomed Ankalaev explains how his rematch with Alex Pereira won't pan out like their first fight. Light heavyweight champion Ankalaev (21-1-1 MMA, 12-1-1 UFC) runs things back with Pereira ...

“Aggressive fighting for the right is the noblest sport the world affords.” These are the words adorning a bronze bas relief of Teddy Roosevelt that sits in my closet. I inherited it from my mother, ...

Decades of research with humans and other species indicate that males are more aggressive than females. But within the family ...