The Last Time the Arctic Was Ice-Free in the Summer, Modern Humans Didn’t Exist

Image: A picture of people on ice and snow. Caption reads: Enjoy it while you can. Image: Thomas A. Brown and Simon T. Belt

slate.com - December 12th, 2014 - Eric Holthaus

Ice has been a relatively constant feature of the Arctic for most of the past 36 million years, but there have been some gaps. Scientists aren’t exactly sure what happened during the most recent major ice-free period, but it’s often considered an analog to our future, warmer Earth. The only difference is, the gap in Arctic sea ice that scientists believe will happen by midcentury is being caused by us.*

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