The Biggest Kangaroos Evolved Long Arms to Fight Over Females

Male kangaroos and wallabies, like a lot of seemingly quiet grazing animals, get into knock-down drag-out fights over females. They obviously don’t have antlers or horns to spar with, but they’re perfectly willing to grapple rivals with their forelimbs and kick the crap out of each other with their big hind feet. » 7/01/15 5:20pm Wednesday 5:20pm