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Changes in Earth's orbit were key to Antarctic warming that ended last ice age

vinces99 (2792707) writes | about 8 months ago

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vinces99 (2792707) writes "For more than a century scientists have known that Earth’s ice ages are caused by the wobbling of the planet’s orbit, which changes its orientation to the sun and affects the amount of sunlight reaching higher latitudes, particularly the polar regions. The Northern Hemisphere’s last ice age ended about 20,000 years ago, and most evidence has indicated that the ice age in the Southern Hemisphere ended about 2,000 years later, suggesting that the south was responding to warming in the north. But new research published online Aug. 14 in Nature shows that Antarctic warming began at least 2,000, and perhaps 4,000, years earlier than previously thought."
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