Physics

More Stories in Physics

  1. toy boats floating right side up and upside down
    Physics

    Toy boats float upside down underneath a layer of levitated liquid

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

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  2. Colliding black hole illustration
    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.

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  3. positronium with an electron in blue and a positron in red
    Quantum Physics

    A measurement of positronium’s energy levels confounds scientists

    A gap in the energy levels of positronium seems to be substantially larger than predicted, and physicists don’t know why.

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  4. blue whirl flame
    Physics

    Four types of flames join forces to make this eerie ‘blue whirl’

    Pinning down the structure of the “amazingly complex” blaze could help scientists control it.

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  5. ice cube
    Physics

    A new experiment hints at how hot water can freeze faster than cold

    A study of tiny glass beads suggests that the Mpemba effect is real.

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  6. atomic bomb explosion at Hiroshima
    Physics

    How understanding nature made the atomic bomb inevitable

    On the anniversary of Hiroshima, here’s a look back at the chain reaction of basic discoveries that led to nuclear weapons.

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  7. illustration of sperm
    Health & Medicine

    Human sperm don’t swim the way that anyone had thought

    High-speed 3-D microscopy and mathematical analyses reveal that rolling and lopsided tail flicks keep the cells swimming in a straight line.

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  8. Large solar flare
    Physics

    The physics of solar flares could help scientists predict imminent outbursts

    Physicists aim to improve space weather predictions by studying the physical processes that spark a solar flare.

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  9. Wormhole illustration
    Physics

    A black hole circling a wormhole would emit weird gravitational waves

    A new calculation reveals the strange gravitational waves LIGO and Virgo could see if a black hole were falling into a hypothetical tunnel in spacetime.

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