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  1. Physics

    A new measurement reveals gravity is still hard to pin down

    After a 10-year effort, physicists got a value for “Big G” that does not settle the debate over one of nature’s hardest numbers to nail down.

    By Mara Johnson-Groh
  2. Animals

    This tree is number one for cloud forest mammals going number two

    The strangler fig is a keystone species in the tropics, providing food and shelter, and a place to poop for 17 different mammal species.

    By Bethany Brookshire
  3. Health & Medicine

    Breath carries clues to gut health

    At-home breath tests could reveal insights about gut health, though their ability to assess food intolerances is not yet clear.