What kicked off the Earth’s rapid cooling 12,800 years ago? In the space of just a couple of years, average temperatures abruptly dropped, resulting in temperatures as much as 14 degrees Fahrenheit cooler in some regions of the Northern Hemisphere. If a drop like that happened today, it would mean the average temperature of Miami … Continue reading New Evidence That an Extraterrestrial Collision 12,800 Years Ago Triggered an Abrupt Climate Change for Earth