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A new study from ETH Zurich geoscientists Giovanni Leone, however, suggests that lava, rather than water or tectonic plate activity, cut the gigantic valleys into the red planet's landscape.
Valles Marineris stretches over 4000 kilometers in length and is 200 kilometers wide, with a maximum depth of 10 kilometers. This makes it 10 times longer and five times deeper than the Grand Canyon, earning it the title of the largest canyon in the Solar System.
- A poem in which the author retracts something said in an earlier poem.