By Irene Klotz, Discovery News, 09.28.12
Scratch water off NASA's Mars rover Curiosity's list of things to find in a two-year quest to learn if the planet most like Earth in the solar system could have supported microbial life.
Less than two months after touching down inside a giant impact basin near the planet's equator, Curiosity has returned clear evidence of flowing water, scientists told reporters during a conference call Thursday.
The proof comes from analysis of pictures of a jagged slab of rock taken with a telephoto camera on the rover's mast.
The rock, which resembles a jackhammered chunk of broken sidewalk, is flecked with rounded pieces of gravel -- too big to have been carried by Martian winds.
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