An Earth scientist solved a Mars mystery about what dug these weird ditches

2 weeks ago 2
Mars Reconnaissance Orbiter views linear dune gullies on Mars

Strange, narrow channels threading through some of Mars' sand dunes have intrigued scientists for years. 

These Martian features don't look like anything on Earth. Early theories proposed that flowing water created these gullies, perhaps when the Red Planet had a warmer, wetter climate billions of years ago. That idea thrilled scientists because it meant Mars might once have Source: https://mashable.com/article/mars-dune-gullies-mystery-solved

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