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  1. Astronomy

    How James Webb Space Telescope data have already revealed surprises

    A distant galaxy cluster’s violent past and the onset of star formation in the more remote universe lie buried in the observatory’s first image.

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  2. Paleontology

    50 years ago, the dinosaurs’ demise was still a mystery 

    In 1972, scientists blamed dinosaur biology for the reptiles’ demise. Years later, researchers ID’d the real killer: an apocalyptic asteroid.

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  3. Paleontology

    Mammal ancestors’ shrinking inner ears may reveal when warm-bloodedness arose

    An abrupt shift in inner ear shape of mammal ancestors 233 million years ago, during a time of climate swings, points to evolution of warm-bloodedness.