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Magnetic pole reversal indicated in 42,000 year old tree rings may have triggered global environmental change
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CBC Radio ·
Posted: Feb 19, 2021 4:15 PM ET | Last Updated: February 19
Tree rings from the ancient Kauri tree in New Zealand showed a spike in radioactive carbon indicative of a magnetic pole reversal(Nelson Parker) comments
Quirks and Quarks8:01When the magnetic poles flip out, Earth seems to suffer
The Earth s magnetic poles have flipped many times in our planet s history - and while we know this is an important geophysical event, we haven t had any good evidence to indicate whether it s an important biological event.