U.S. scientists say pictures sent back from the Curiosity
probe on Mars show clear evidence that water - essential for life - once flowed
on the planet.
The pictures of Curiosity's landing site in
a Martian crater show pebbles and stones driven into the rock. The
scientists say the stones are smooth and round, a sign that they were driven by
flowing water - possibly a waist-deep river teeming with microorganisms.
The scientists say this area of Mars may have at one
time been habitable.
The Curiosity probe landed on Mars last
month for a two-year mission to explore the surface of the red planet.
Sources :
http://www.voanews.com/content/us-scientists-clear-evidence-mars-had-flowing-water/1516348.html
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