In a previous "What If" video, we confronted the theoretical scenario in which the oceans were drained. As an aside in that video, Randall Munroe explained the lack of water in a throwaway manner, saying it was sent to Mars. But that made viewers wonder what that would do to Mars. We know that Mars once had plenty of water, and still may have a significant amount, but the surface is almost all dry. So let's look at that scenario, even though it will never happen. We have enough trouble sending robots to Mars.
See, Mars is very cold, has no atmosphere, and the geology of the surface is very different from that of earth. But if we sent enough salt water, the red planet would start to display continents and islands. Eventually the water would freeze, maybe. Or maybe not. Maybe we could send some atmosphere to Mars, too, while we're in the shipping business. Like we have enough to spare. -via Laughing Squid
If you can find a way to gather water and transport it to another planet (Star Trek transporter, maybe?) then the place to get it isn't Earth - it's Venus. From way too much to way too little would make both planets better, for our use. (And you could toss away all the other junk chemicals Venus is loaded with.)
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