/u/porkchop_d_clown's posts in /r/askscience
Ignoring the difficulty of capturing a comet or adjusting its orbit: If we could arrange for a comet to strike Mars, what would the effect be? Could we terraform Mars by hitting it with a cubic mile of water?
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Relating to the previous question about plate tectonics: Does Earth have a disproportionate amount of heavy elements compared to the other inner planets?
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