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  1. Physics

    Toy boats float upside down underneath a layer of levitated liquid

    The upward force of buoyancy keeps objects afloat even in unusual conditions.

    By Maria Temming
  2. Physics

    Record-breaking gravitational waves reveal that midsize black holes do exist

    The biggest merger of two black holes so far raises questions about how the pair of objects came to be.

    By Emily Conover
  3. Animals

    Flamboyant cuttlefish save their bright patterns for flirting, fighting and fleeing

    A new field study of flamboyant cuttlefish shows they don’t always live up to their reputation.

    By Helen Thompson
  4. Health & Medicine

    50 years ago, scientists were trying to develop a low-emission car

    Electric cars have surged in popularity, but the vehicles still contribute to greenhouse gas emissions.