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  1. Animals

    Among chimpanzees, thrill-seeking peaks in toddlerhood

    In humans, teens do the most dangerous things. In chimpanzees, that honor goes to toddlers. The difference may lie in caregiver supervision.

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  2. Animals

    An all-female wasp is rapidly spreading across North America’s elms

    The elm zigzag sawfly has spread to 15 states in five years. Now it's attacking the tree that cities planted to replace Dutch elm disease victims.

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  3. Planetary Science

    A newly spotted asteroid spins faster than any of its size ever seen

    Among the first finds from the Vera C. Rubin Observatory, the discovery hints at a population of exceptionally strong asteroids.