7 Billion-Year-Old Stardust is Oldest Material on Earth

7 Billion-Year-Old Stardust is Oldest Material on Earth

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Example of a nebula and (inset) the presolar grains that have been discovered (via NASA/W. Sparks/R. Sahai/PA)

A meteorite that fell in Australia 50 years ago contains the oldest solid material ever found on Earth: stardust. The remnants of a celestial body that’s burnt up and died, cosmic dust eventually […]

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