Captions provided by CCTubes – Captioning the Internet! Welcome to the US National Ice Core Laboratory in Denver, Colorado, where there’s a giant freezer filled with 20km of ice cores from Greenland and the Antarctic. Here’s why.
Thanks to everyone at the US National Ice Core Laboratory! You can find out more about them here: http://icecores.org/
Edited by Michelle Martin, @mrsmmartin
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