Ancient trees show how hot summers have gotten
The annual rings on the trunk of a conifer tree. | Photo: Getty Images
A summer marked by deadly heatwaves across Asia, Europe, and North America last year turns out to have been the hottest in the Northern Hemisphere in at least 2,000 years, according to a new study published in the journal Nature.
Officially, 2023 went down in history books as the hottest on record for the planet — but those records only started in 1850. To see how drastically the climate has changed over millennia...
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