Researchers studying fragments of an ancient meteorite that exploded over Earth 20 years ago have detected chemical traces of fluid, thought to be the solar system's oldest at about 4.5 billion years, according to findings published in Proceedings of the National Academy of Sciences. Scientists used atom probe tomography to take an extremely close-up view of structures within the pieces, which they say could only have formed in an alkaline fluid environment rich in sodium.
Oldest fluid in solar system detected in meteorite pieces
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