Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.

  1. Tech

    Laser vision reveals hidden worlds

    From discovering ancient ruins to forecasting climate change, the laser mapping technology called lidar is changing many fields of science.

  2. Tech

    Explainer: What are lidar, radar and sonar?

    Radar, sonar and lidar and are three similar technologies. Each relies on the echoing of waves — radio, sound or light waves — to detect objects.

  3. Animals

    Mates or survival: Which explains a bird’s color?

    When male birds are brightly colored, we assume that’s because their plumage attracts the gals. But a new study with thousands of museum specimens shows that sometimes survival is just as important a factor behind bird color.

  4. Physics

    How to pick up messages after they’re gone

    By watching for light’s ‘echoes,’ physicists think they can retrieve information being relayed by or as light. It could make it possible for astronomers to view distant objects without having to see the light they cast off.

  5. Health & Medicine

    Vision-ary high tech

    New devices are being developed to improve, restore or preserve the vision of people with eye diseases, such as glaucoma and macular degeneration. One device is a telescopic contact lens than can be zoomed with a wink.

  6. Physics

    Measure the width of your hair with a laser pointer

    You can measure the width of a human hair with the help of a laser pointer, some math and a phenomenon called diffraction.

  7. Tech

    Digital displays get flexible

    Flexible and unbreakable digital displays could soon be for sale, thanks to a new organic transistor made from plastic.

  8. Physics

    World’s coolest ‘clock’ is also crazy-accurate

    This is the time to beat — the world’s most accurate atomic clock ever. At its heart is a ‘fountain’ of cesium atoms chilled nearly to absolute zero!

  9. Space

    How the outer sun gets so hot

  10. Tech

    Cell phones on the brain

    When an active cell phone is pressed against the ear, the brain gets busier.

  11. Tech

    Electronic paper turns a page

  12. Tech

    Cell phones and possible health hazards