The research team came to their hypothesis after analyzing rocks, lakes, and glaciers.
“This is sort of a dark archaeology, where we benefit from climate change that's making this ice melt."
New evidence reveals a previously unrecorded indigenous population and poses a major challenge to existing theories about the earliest Americans.
At the time, volcanoes in Iceland were erupting 50 times more often than today.
Western spotted skunks do handstands to make themselves appear more threatening.
Melting glaciers turning land to bog was behind widespread extinctions of animals like the giant sloth and woolly mammoth between 15,000 and 11,000 years ago.