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 (-10°C) cooler in some regions of the Northern Hemisphere. If a drop like that happened today, it would mean the average temperature of Miami Beach would quickly change to that of current Montreal, Canada. Layers of ice in Greenland show that this cool period in the Northern Hemisphere lasted about 1,400 years. This climate event, called the Younger Dryas by scientists, marked the beginning of a decline in…
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