This Breathtaking Close-Up of Mars’ ‘Grand Canyon’ Is Giving Us Goosebumps – ScienceAlert

Tithonium Chasma is one big canyon. At a staggering 810 kilometres (503 miles) long, it’s a large part of Valles Marineris – the biggest canyon system we know of in the whole Solar System.
This clos… [read more]

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