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Ancient shell shows days were half-hour shorter 70M years ago
Fossil rudist bivalves ( Vaccinites ) from the Al-Hajar Mountains, United Arab Emirates. Credit: Wikipedia, Wilson44691 – Own work, Public Domain
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2
Scientists find massive reserves of mercury in permafrost
Researchers have discovered permafrost in the northern hemisphere stores massive amounts of natural mercury, a finding with significant implications for human health and ecosystems worldwide.
3
Greenland ice sheet is close to a melting point of no return
Once we emit about 1000 gigatons of carbon, much of the massive ice sheet will melt irreversibly. We’ve emitted 500 gigatons so far.
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A century of reforestation helped keep the eastern US cool (2024)
Throughout the 20th century, as most of the world warmed, the eastern US remained mysteriously cool. Now, scientists think they have an explanation: trees.