Tuesday, 26th, 2024 | 4:50AM Updated

Two sizes of ripples are evident in this Dec. 13, 2015, view of a top of a Martian sand dune, from NASA's Curiosity Mars rover. Sand dunes and the smaller type of ripples also exist on Earth. The larger ripples are a type not seen on Earth nor previously
Why Sand Dunes on Mars Are So Different from Earth

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