Growing up in Ohio, I thought I knew cows. Big smelly creatures that spent most of their time lazily wandering around the pasture, and apart from their size, completely harmless, or so I thought..

 "Australia's cute and cuddly koalas are being trampled to death by killer cows. The iconic native animals, which live in trees, are being killed or injured when territorial cows with calves at heel act in concert to circle and trample them when they go to ground to change trees."