Researchers have discovered a massive ancient subglacial trough that’s far bigger than the Grand Canyon, under the ice of Antarctica.
The massive valley, which has been dubbed Ellsworth Trough by the research team, is up to 3 kilometers deep, more than 300 kilometers long and up to 25 kilometers across. It is so large, researchers say it can be seen from space through its effect on the surface contours of the ice sheet above it.
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