James Riordon is a freelance science writer who covers physics, math and astronomy, and coauthor of the book Ghost Particle – In Search of the Elusive and Mysterious Neutrino.

All Stories by James R. Riordon

  1. bull sperm swimming in various directions
    Health & Medicine

    Cooperative sperm outrun loners in the mating race

    Sperm that swim in clusters travel more directly toward the uterus, while overcoming fluid currents in the reproductive tract.

  2. illustration of a two entangled particles

    Quantum experiments with entangled photons win the 2022 Nobel Prize in physics

    Three pioneers in quantum information science share this year’s Nobel Prize in physics.

  3. photo of a room-temperature superconductor material being squeezed between two diamonds

    Despite a retraction, a room-temperature superconductor claim isn’t dead yet

    A high-profile retraction called a superconductivity result into question. But a new experiment appears to support it.

  4. An X-ray image shows a person's jaw, including a tooth implant in the lower left jaw
    Health & Medicine

    False teeth could double as hearing aids

    Dental implants can conduct sound through jawbone, making them candidates for discreet, high-quality hearing aids, researchers say.

  5. tweezers hold a diamond sensor as light shines through
    Quantum Physics

    This environmentally friendly quantum sensor runs on sunlight

    Quantum sensors often rely on power-hungry lasers to make measurements. A new quantum magnetometer uses sunlight to measure magnetic fields instead.

  6. illustration of the orbiting MICROSCOPE experiment satellite with earth in the background

    Falling objects in orbit show Einstein was right — again

    For more than two years, a pair of metal cylinders fell at the same rate in space, confirming the equivalence principle, a key tenet of general relativity.

  7. photo of a windchime in a backyard

    The Windchime experiment could use gravity to hunt for dark matter ‘wind’

    Though decades away, the project hopes to use an array of ultrasensitive sensors as a “wind chime,” jostled by dark matter blowing past Earth.

  8. Illustration of two black holes merging and emitting gravitational waves. The black holes, illustrated as dark spheres, have green arrows indicating spin in opposite directions

    Two black holes merged despite being born far apart in space

    A closer look at gravitational wave data reveals 10 overlooked mergers, including one between black holes that probably found each other late in life.

  9. microscope image of tiny Dictyostelium discoideum amoebas shown as dots forming larger blobs
    Health & Medicine

    Tiny amoebas move faster when carrying cargo than without

    A new study of the carrying capacity of single-celled amoebas may help scientists develop mini “trucks” to precisely target disease in the human body.

  10. Concorde supersonic jet

    Why even small sonic booms are more annoying in cities

    Quieter sonic booms from next-generation planes could still be annoying in cities thanks to narrow streets and tall buildings, simulations suggest.

  11. Smoke from the Cerro Pelado fire in New Mexico in the background against an emergency vehicle driving on an empty road
    Science & Society

    Growing wildfire threats loom over the birthplace of the atomic bomb

    Climate change is expected to make wildfires worse across much of the Southwest United States. A key nuclear weapons lab could be in the hot zone.

  12. black and white photo of water poured from above splashing on raw chicken
    Health & Medicine

    How to wash chicken in the kitchen more safely, according to physics

    Despite the advice of health experts, most people who cook chicken at home wash it. New research offers ways to reduce spreading dangerous germs.