When scientists looked at Mars through early telescopes, they saw a fuzzy, rust-colored globe scored by mysterious dark gashes some believed were alien canals. Later, armed with sharper images, we scoffed at such naiveté. Mars is obviously dry as a bone and uninhabited. Now, with a great deal more information from rovers and satellites, we believe Mars was once wet. As for life? The jury's still out.
Read more: http://snapzu.com/powpow/our-solar-systems-9-extraterrestrial-oceans-in-one-surprising-infographic
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