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Arabica coffee plant appears to have evolved between 600,000 and 1 million years ago after two other coffee species crossbred in the forests of what is now Ethiopia.
Doctors say it's very unusual to develop a visual impairment as the first symptom of lung cancer.
Prehistoric cold viruses are hard to find in the historical record, but scientists have unearthed some evidence in ancient human teeth.
Researchers say a villa buried by the eruption in A.D. 79 corresponds with records of the Roman emperor's death in A.D. 14.
Scientists have designed a physical qubit that behaves as an error-correcting "logical qubit," and now they think they can scale it up to make a useful quantum computer using just a few hundred of them, rather than millions.