US Scientists Say New Evidence Shows Water on Mars
Scientists say U.S. satellite images of Mars provide strong evidence that liquid water still flows on the red planet, suggesting an environment that could be hospitable to life. But new pictures also show other signs that Mars could be a dangerous place for life, specifically visiting astronauts.

The images come from a spacecraft that orbited Mars for a decade, the Mars Global Surveyor, which the U.S. space agency recently lost contact with. Researchers compared some its final pictures of the Martian surface with ones it took seven years ago and have documented the formation of new craters and possible evidence for liquid water flowing in gullies.

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