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Image from: NASA/JPL
The small, round rock shown here was named The Lamb. Soils found around the Lamb by Mars Pathfinder's Rover were unique. They seem to be made of a special sort of iron which requires more water than is presently seen on Mars. This finding could show that in the past, Mars was warmer and had more water. This would help answer large questions scientists have about Mars. Perhaps there was enough water to actually rain on the surface!
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