David Shiga

All Stories by David Shiga

  1. Astronomy

    Dark Influence

    A study of galaxy clusters tests whether dark matter particles can collide with each other, while other observations show that dark matter doesn't behave as expected near the centers of galaxies.

  2. Earth

    Lightning creates radiation-safe zone

    A relatively safe region within the seas of radiation that surround Earth owes its existence to lightning storms.

  3. Tech

    Leak Locator: Ultrasound for finding holes in spacecraft

    Researchers have devised a way to pinpoint leaks in spacecraft by listening to ultrasound waves traveling through the ship's hull.

  4. Planetary Science

    Jupiter as mirror for the sun’s X rays

    X rays emanating from Jupiter's midriff actually originate on the sun, new observations show.

  5. Health & Medicine

    The Zero Gravity Diet

    Living in space punishes the body as much as smoking a pack of cigarettes a day, says a new study of astronaut health and nutrition.

  6. Astronomy

    Nursery Pictures: Astronomers glimpse primordial clustering

    Astronomers have found the earliest traces of galaxy clustering, from a period just 1 billion years after the birth of the universe.

  7. Astronomy

    Ghostly Galaxy: Massive, dark cloud intrigues scientists

    Astronomers say they have found the only known galaxy devoid of stars.

  8. Poisonous Partnership

    Tools from molecular biology are providing new insights into the viruses employed by parasitoid wasps to manipulate their caterpillar hosts.

  9. Health & Medicine

    Healing Gone Haywire: Wound-repair genes signal cancer spread

    An experimental test predicts which breast tumors will spread rapidly without treatment and which are likely to be less aggressive by tracking the activity of genes normally involved in mending injured tissue.

  10. Health & Medicine

    Disease Detector: Chemical test may spot Alzheimer’s

    A new test that detects very low levels of protein clumps associated with Alzheimer's may provide an early warning for the disease.

  11. Astronomy

    Black Hole Bonanza: 10,000 objects near our galaxy’s center

    Astronomers have found the first evidence of a suspected population of black holes near the Milky Way's center, each hole with 10 times the mass of the sun.

  12. Astronomy

    Stars in the dust

    The dusty disks surrounding three nearby stars show that they played host to massive collisions between asteroid-like objects as recently as 100 years ago.