Wave ripples—the undulating lines in sandy shores that form when the wind pushes shallow water back and forth—are a common sight on Earth’s lakes and beaches. Now, NASA’s Curiosity rover has ...
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Curiosity Rover Uncovers 3.7-Billion-Year-Old Ripples That Suggest Mars Once Had Ice-Free Lakes
In the dusty, rust-colored expanse of Gale Crater on Mars, NASA’s Curiosity rover has uncovered a ghostly echo of a long-lost world. Etched into the rock are tiny undulations — ripples frozen in time, ...
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