ancient river 1000mi long, 4mi wide, 1000ft deep on mars

[John Galt]

[WizardfromOz]

Wow thats crazy stuff - And given the familiarly with Earth morphology, getting silt samples at some point is going to really help piece together the history of wet Mars

[foadi]

i dont think there are any rivers on earth that are 1000 ft deep. thats extremely deep for a river.

[WizardfromOz]

[John Galt]

[Precocity]

[Stratego]

When you take Play-Doh and try to form a perfect sphere there's always some small lines on the surface, even though there is no water running through it. Maybe this "river" is just a surface imperfection because if this was a river we should expect to see other evidence of bodies of water that feed the high ground source of the river.

[The Dharma Bum]

I'm waiting for the evidence that Mars is the last planet we despoiled before we moved to this one. By the time we use this one up and are ready to move again Venus should be ready

[The Comrade]

venus looks like a planet that humans have terminally f**k.

[WizardfromOz]