David Carrier

Why males pack a powerful punch

Elk have antlers. Rams have horns. In the animal kingdom, males develop specialized weapons for competition when winning a fight is critical. Humans do too, according to new research.


A SCIENTIFIC FISTFIGHT

U study set off renewed debate over the theory that the human hand evolved not only for manual dexterity, but so prehistoric human relatives could make clenched fists to protect hand bones during fights over females.