World's Grandest Canyon May Be Hidden Beneath Antarctica

World's Grandest Canyon May Be Hidden Beneath Antarctica
World's Grandest Canyon May Be Hidden Beneath Antarctica
World's Grandest Canyon May Be Hidden Beneath Antarctica
World's Grandest Canyon May Be Hidden Beneath Antarctica
Newly discovered giant rifts and lakes mean that ice sheets could become surprisingly unstable as climate changes

-- Read more on ScientificAmerican.com


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