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King Of Canyons - Mars Valles Marineris
2012-10-23 05:13:19

April Flowers for redOrbit.com - Your Universe Online One of the most awe-inspiring sights on the planet Earth is the Grand Canyon. The Colorado River has cut through 2 billion years of geologic history, carving out a canyon that is 277 miles long and up to 18 miles wide. However, next to Valles Marineris on Mars, the Grand Canyon is a mere scratch in the ground. Valles Marineris stretches over 4000 kilometers in length and is 200 kilometers wide, with a maximum depth of 10 kilometers....