Nov 18, 2016

Scientists Discovered a Mind-Boggling Chasm on Mercury

Posted by in category: space

Placed on Earth, it would stretch from Washington DC to New York to Detroit. Larger than the Grand Canyon, wider and deeper than East Africa’s Great Rift Valley, Mercury’s newly-discovered “Great Valley” boggles the imagination. But it’s more than size that makes this geologic feature remarkable. The Great Valley may be our best evidence that Mercury’s entire crust is contracting.

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