Ancient tectonic activity was trigger for ice ages

Ancient tectonic activity was trigger for ice ages Boston MA (SPX) Apr 25, 2016 - For hundreds of millions of years, Earth's climate has remained on a fairly even keel, with some dramatic exceptions: Around 80 million years ago, the planet's temperature plummeted, along with carbon dioxide levels in the atmosphere. The Earth eventually recovered, only to swing back into the present-day ice age 50 million years ago. Now geologists at MIT have identified the likely cause ... more

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