Physics

More Stories in Physics

  1. Physics

    Scientists Say: Fission

    Nuclear fission is the process of splitting atoms apart to release huge amounts of energy.

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  2. Animals

    Tiny bumps on polar bear paws help them get traction on snow

    Super-small structures on the Arctic animals’ paws might offer extra friction that keeps them from slipping on snow, a new study concludes.

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  3. Physics

    Explainer: What is friction?

    The force of friction always acts to slow things down. It depends on just two factors: the surfaces and how hard they press together.

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  4. Physics

    Explainer: Radiation and radioactive decay

    Like clockwork, radioactive forms of some elements shed parts of themselves as they attempt to become nonradioactive.

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  5. Physics

    Explainer: Radioactive dating helps solve mysteries

    Knowing the decay rate of radioactive elements can help date ancient fossils and other artifacts.

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  6. Earth

    Fossil-fuel use is confusing some carbon-dating measurements

    Carbon-14 dating of recent artifacts will soon give scientists confusing results. That’s another price society pays for its reliance on fossil fuels.

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  7. Plants

    Why dandelions are so good at widely spreading their seeds

    Individual seeds on a dandelion release most easily in response to winds from a specific direction. As the wind shifts, this scatters the seeds widely.

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  8. Tech

    A tool as small as a human cell can scan for contaminants and more

    Tiny spectrometers might someday show up on smart devices. They could help people scan for ingredients or contaminants in foods and other materials.

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  9. Chemistry

    Scientists Say: Fluorescence

    This property causes materials — including some animals’ skin, fur or feathers — to glow under light.

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