For the first time in history, scientists have found a planet like Earth. NASA announced Thursday that its Kepler-planet finding mission has discovered Kepler186f, which is made up of the same materials as Earth (iron, rock, ice, and water) and is located in the same “Goldilocks zone” of a star that allows for liquid water and potentially life. “Perhaps it’s more of an Earth cousin than an Earth twin,” Dr. Thomas Barclay of the Bay Area Environmental Research Institute said.
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