What caused the last ice age to end around 10,000 years ago?
Nearly 10,000 years ago, Earth came out of its most recent ice age. Vast, icy swaths of land around the poles thawed, melting the glaciers that had covered them for nearly 100,000 years.
"One of the big questions in my research field right now is why the last ice age ended," Brenda Hall, a glacial geologist and professor of Earth and climate sciences at the University of Maine, told Live Science. Milankovitch found that these factors combine at regular intervals to cause land at 65 degrees north latitude to become warmer than normal and theorized that this warming and then subsequent cooling of the Northern Hemisphere explained the planet's cycle of ice ages — or glacials — and warmer periods — or interglacials.
In recent years, glaciologists have attempted to fill in the gaps between what we know about Milankovitch cycles and Earth's ice ages. Hall said that the missing link needs to explain how these cycles cool and warm the entire planet at once, not just one hemisphere at a time.
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