A rare, washing-machine-sized meteor that fell to Earth last month is the first large carbonaceous chondrite to fall to Earth in the past 50 years. Because it's basically a ball of clay, researchers expect it to provide ample data on the history of water in the solar system.

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A rare, washing-machine-sized meteor that fell to Earth last month is the first large carbonaceous chondrite to fall to Earth in the past 50 years. Because it's basically a ball of clay, researchers expect it to provide ample data on the history of water in the solar system.