February 20, 2021 01:07 am GMT
Original Link: https://boingboing.net/2021/02/19/ancient-relic-points-to-a-turning-point-in-earths-history-42000-years-ago.html
Ancient relic points to a turning point in Earth's history 42,000 years ago
Researchers from UNSW Sydney and the South Australian Museum have been studying the rings of ancient New Zealand kauri trees, which can record environmental changes over many thousands of years. They found clues about the last time the earth's magnetic poles switched, around 42,000 years ago. — Read the rest
Original Link: https://boingboing.net/2021/02/19/ancient-relic-points-to-a-turning-point-in-earths-history-42000-years-ago.html
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