What drove North America’s large mammals to extinction after the last ice age

What drove North America’s large mammals to extinction after the last ice age

Fifty thousand years ago, North America’s landscapes were alive with an astonishing array of enormous creatures. Massive woolly mammoths roamed vast icy plains, while dense forests echoed with the growls of mastodons and saber-toothed cats. Herds of gigantic bison, towering camels, and huge wolves traveled freely, and oversized beavers claimed lakes and rivers. East of the Rockies, giant sloths weighing over a ton lumbered slowly through lush gr…