Photos gathered during NASA's missions orbiting Mars have revealed that the planet was once home to raging rivers -- and that those rivers existed more recently than previously thought, according to a new study
Mars may seem inhospitably dry now, but NASA's rovers have shown that water was once abundant on the Red Planet. Photos gathered during NASA's missions orbiting Mars have revealed that the planet was once home to raging rivers -- and that those rivers existed more recently than previously thought, according to a new study.
The rivers were two times wider than any on Earth, according to the deep riverbeds they left carved into the surface, and they could be found at hundreds of locations across the planet. NASA's photos showed well-preserved river channels, deltas and fan-shaped masses of material called alluvium that is carried and deposited by water.The width, steepness and size of the gravel in the riverbeds helped researchers determine the force of the water flow.
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