US rolls back automatic protections for imperiled wildlife
The United States has canceled automatic protections for certain imperiled animals, a move critics say could hasten extinctions and reshape conservation policy.
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Extinctions
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Ancient Comet Impact Linked to Climate Chaos and Extinctions
New research supports the Younger Dryas Impact hypothesis, suggesting a fragmented comet caused significant climatic changes and extinctions 12,800 years ago through airbursts. Evidence includes impact proxies like platinum and shocked quartz found in the eastern U.S., indicating high-pressure, high-temperature events. These findings suggest the comet's airbursts led to abrupt climate shifts and the extinction of megafauna, impacting human cultures like the Clovis.