This Week in Science: Martian Mystery, Rock-Hard Snail Teeth, and the Big ... - Huffington Post

Huffington PostThis Week in Science: Martian Mystery, Rock-Hard Snail Teeth, and the Big ...Huffington PostScientists think a mysterious plume seen above Mars might be a large cloud or an aurora--but neither of these explanations squares with what we think we know about the Martian upper atmosphere. Scientists now think sea snail teeth (not spider silk) are ...

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