Thickness of the Ice Sheets 21,000 Years Ago Compared to Modern Skylines

From the brilliant comic xkcd:

Thickness of ice sheets

Data adapted from “The Laurentide and Innuitian ice sheets during the Last Glacial Maximum” by A.S. Dyke et. al., which was way better than the sequels “The Laurentide and Innuitian ice sheets during the Last Glacial Maximum: The Meltdown” and “The Laurentide and Innuitian ice sheets during the Last Glacial Maximum: Continental Drift.”

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