Crater Offers Glimpse Into Mars’ Wetter Past

Crater in Mars’ Hellas basin. (ESA/DLR/FU Berlin)

A nearly 20-mile-wide impact crater near Mars’ Hellas basin formed at a time when the planet’s environment was much wetter, as shown by the fluidized nature of the debris excavated by the impact. The photo was taken by the European Space Agency’s Mars Express spacecraft in May and released by the agency on Thursday.

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