>> The cooling period was likely caused by the melting of an ice sheet that covered the Arctic and parts of North America and Europe, creating an influx of fres

>> The cooling period was likely caused by the melting of an ice sheet that covered the Arctic and parts of North America and Europe, creating an influx of freshwater that would have weakened a vital ocean current called the Atlantic Meridional Overturning Circulation by up to 95 percent. Researchers recently predicted a weakening of this current again, which they say could occur within this century because of human-caused climate change. << [https://www.smithsonianmag.com/smart-news/a-vital-ocean-current-system-could-collapse-as-soon-as-2025-study-predicts-180982605/ https://www.smithsonianmag.com/smart-news/a-vital-ocean-curr...]