Physics

  1. Physics

    Understanding light and other forms of energy on the move

    Radiation needn’t be scary, especially if it allows us to see our family or use our cell phones. Here’s a guide to light and other types of emitted energy.

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  2. Physics

    Shape-shifting cuts give shoes a better grip

    With pop-out structures inspired by kirigami and animals, a shoe sole goes from flat to spiky to boost friction on slippery surfaces such as ice.

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  3. Physics

    A contrast between shadows and light can now generate electricity

    A new device exploits the contrast between bright spots and shade to produce a current that can power small electronics.

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  4. Space

    Oldest disk galaxy puts a new spin on galaxy growth

    A spinning disk galaxy has been found in the early universe. Its existence is a surprise.

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  5. Chemistry

    Scientists Say: Polymer

    Polymers can be natural or man-made, but they are all big molecules made up of smaller units linked together.

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  6. Chemistry

    Working up a sweat may one day power up a device

    Tech that turns sweat into power may make for greener gadgets. A new device uses perspiration to charge a supercapacitor and run a sensor.

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  7. Plants

    Silk-based microneedles may help treat diseased plants

    Engineers have invented silk microneedles to inject medicines into plants. One day farmers might use drones to dart their sick plants with meds from the air.

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  8. Space

    Astronauts may be able to make cement with their own pee

    Lunar dust and a compound found in urine might one day be used to build future dwellings on the moon, a new study finds.

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  9. Chemistry

    Let’s learn about colors

    The colors we see come from electromagnetic waves traveling through space and hitting our eyes.

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  10. Physics

    Physicists foil classic oobleck science trick

    Cornstarch and water — best known as oobleck — solidifies upon impact. Researchers used a new technique to make it stay liquid.

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  11. Space

    Scientists Say: Spaghettification

    Black holes cram a lot of mass into a small area. When another object gets close, the black hole’s gravity can stretch it into a noodle-like strand.

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  12. Physics

    Scientists Say: Momentum

    This word describes a property of a moving object based on its mass and the direction and speed of its motion.

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