Grains of silicon carbide inside the Murchison meteorite, which fell on an Australian town in 1969, formed around 7 billion years ago. That makes them roughly 2.5 billion years older than the Sun and the oldest solid material ever held in a human hand. The meteorite is a CM2 carbonaceous chondrite rich in organic compounds.
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Summary by ByteBrief
An Early Step on the Long, Strange Road to Photosynthesis