NASA’s probe determines the internal structure of Mars

A team of instruments leading from France and the UK determines that the rigid outer part of Mars must be 20 km thick or 39 km directly below the probe (depending on the precise sublayer that exists). Extrapolating to the known surface geology of the rest of the planet, this suggests an average thickness between 24 km and 72 km. In contrast, the Earth’s average crust thickness is 15-20 km. Only in a continental region like the Himalayas can it reach 70 km.

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