Jakobshavn glacier, West Greenland [image credit: Wikipedia]
This article asserts that climate changes, namely warm periods that it tells us have happened many times before in recent history, can now be attributed to humans if they happen again.
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In 1966, US Army scientists drilled down through nearly a mile of ice in northwestern Greenland—and pulled up a fifteen-foot-long tube of dirt from the bottom, says the University of Vermont.
Then this frozen sediment was lost in a freezer for decades. It was accidentally rediscovered in 2017.
In 2019, University of Vermont scientist Andrew Christ looked at it through his microscope—and couldn’t believe what he was seeing: twigs and leaves instead of just sand and rock.
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