Did a comet explosion affect Earth's climate 12,800 years ago?
A comet explosion nearly killed humanity 12,800 years ago About 12,800 years ago, a geological blink of an eye, global temperatures plummeted suddenly and dramatically. The frigid conditions of the Younger Dryas cooling period lasted more than 1,200 years. But it shouldn't have happened. The Earth was warming when the cooling began. On June 25,