Evidence for liquid water in the Martian past is provided by the discovery of what?

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Evidence for liquid water in the Martian past is provided by the discovery of what?

2007-07-11 09:20:42 · 4 answers · asked by Girl 3 in Science & Mathematics ➔ Astronomy & Space

Meandering drainage valleys, a thick atmosphere, volcanic activity, a strong magnetic field, or modern oceans?

2007-07-11 09:48:52 · update #1

4 answers

scientists unveiled photographs from NASA's Opportunity rover showing cross-bedded sedimentary rocks indicating that at least at one point on the martian surface - Meridiani Planum - a shallow, salty sea once ebbed and flowed.

2007-07-11 10:03:19 · answer #1 · answered by Grasshopper 5 · 0⤊ 0⤋

Coast Lines

2007-07-11 16:23:37 · answer #2 · answered by Syn 3 · 0⤊ 0⤋

Rust in rocks

2007-07-11 16:28:45 · answer #3 · answered by Sophie B 7 · 0⤊ 0⤋

i remember hearing something about a dried up ocean, or pit, or lake, something along those lines.

2007-07-11 16:23:57 · answer #4 · answered by playpwnsu 2 · 0⤊ 0⤋