NASA / GODDARD SPACE FLIGHT CENTER / SVS / SCIENCE PHOTO LIBRARY NASA / GODDARD SPACE FLIGHT CENTER / SVS / SCIENCE PHOTO LIBRARY
Mars water loss. Animation showing Mars and its ancient ocean 4.5 billion years ago, and the gradual loss of that ocean. The loss of the water turned Mars into a dry, desert world, with some water remaining in the ice found at the poles. The Martian polar ice caps are the main reservoirs of water on the planet today.
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