Why Are There No More Giant Mammals? The Extinction of Megafauna
Imagine a world where enormous ground sloths the size of elephants wandered the forests of North America, saber-toothed cats stalked the plains, and woolly mammoths thundered across landscapes that are now cities and farms. That world was real, not too long ago in geological terms. It vanished with a speed that still shocks scientists today. ...












