Space/Science — HabitableZone

Space/Science » in reply to Old news, but FALSE.

Not exactly

Unlike earth, the surface of Mars does not recycle. And, the dispersion of olivine across the martian surface suggests that the climatic conditions that allow for its existence have been pretty much ubiquitous for a very, very long time. I don't think this forcloses the possibility of a warm, wet Mars very early in its history. But its certainly closes the door on the wet stuff about 3.5 billion years ago - perhaps punctuated by occasional impact-induced floods during the billions of years that followed.

Nor does it necessarily close the door on the possiblity of finding evidence of extant or extinct microbial life on Mars. But it does make the possiblity of a sterile Mars more plausible.

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