Gargantuan Graveyard

Excavation at an airport construction site in Mexico City, uncovered 200 Columbian mammoths. They came to North America 1,000,000 years ago, and were bigger and less hairy, than woolly mammoths. 2 mammoth traps were discovered earlier, leading scientists to believe early humans hunted Columbian mammoths in great numbers. They went extinct around 10,000 years ago.