Under the Sea, a Hidden Climate Variable: Thawing Permafrost - Undark Magazine

Carefully mapping the changing topology of the Arctic Ocean floor, scientists are racing to study submarine permafrost.

Around 20,000 years ago, the world was so frigid that massive glaciers sucked up enough water to lower sea levels by 400 feet. As the sea pulled back, newly exposed land froze to form permafrost, a m… [+7744 chars]

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