Researchers find sulfur reducers were at work on the early Earth

(Phys.org) —A lot can happen to a rock over the course of two and a half billion years. It can get buried and heated; fluids remove some of its minerals and precipitate others; its chemistry changes. So if you want to use ...

New clues in Easter Island hat mystery

(PhysOrg.com) -- A team of archaeologists has come one step closer to unravelling the mystery of how the famous statues dotting the landscape of a tiny Pacific island acquired their distinctive red hats.

Rocks show Mars once felt like Iceland

Once upon a time, seasons in Gale Crater probably felt something like those in Iceland. But nobody was there to bundle up more than 3 billion years ago.

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