Vol. 167 No. #17
Archive Issues Modal Example

More Stories from the April 23, 2005 issue

  1. Planetary Science

    A Martian haven for life?

    Images taken by two Mars spacecraft suggest that a volcano on the Red Planet erupted long ago at the confluence of two riverbeds, indicating that the region had two of the prequisites for life: heat and water.

  2. Obesity may aggravate flu

    At least in mice, obesity can greatly exaggerate the severity of flu by impairing the body's immune response.

  3. Health & Medicine

    Company pulls pain drug from market

    The Food and Drug Administration has asked Pfizer to stop selling its prescription pain medication valdecoxib (Bextra).

  4. Earth

    Balloons, condoms release likely carcinogens

    Balloons and condoms that come in contact with body fluids discharge chemicals suspected of being human carcinogens.

  5. Planetary Science

    Comet mission loses some focus

    A camera aboard the Deep Impact spacecraft, set to fire a projectile into the icy heart of Comet Tempel-1 on July 4, is slightly out of focus.

  6. Health & Medicine

    Step up to denser bones

    Step aerobics proved better than resistance exercises for building bone density.

  7. Anthropology

    Noses didn’t need cold to evolve

    Neandertals evolved big, broad noses not in response to a cold climate, as has often been argued, but in conjunction with the expansion of their upper jaws.

  8. Anthropology

    These spines were made for walking

    A new analysis of fossil backbones indicates that human ancestors living around 3 million years ago were able to walk much as people today do.

  9. Physics

    Extreme Matter: Mother of all material flows into view

    By making an extremely hot and dense state of matter that, surprisingly, is a liquid, physicists say they may have finally created a sample of matter much like the primordial stuff that permeated the newborn universe and gave rise to all other matter.

  10. Astronomy

    Distant Dust: Asteroid belt or boiling comet?

    A swarm of warm dust surrounding a star 41 light-years from Earth may be a sign of the closest extrasolar analog to the solar system's asteroid belt.

  11. Ecosystems

    Ambush Ants: Beware the moldy patch on that branch

    Tiny tropical ants build shaggy platforms on plants and hide underneath them, poised to reach out and capture insects that may be far larger than themselves.

  12. Health & Medicine

    Fast Start: Sex readily spreads HIV in infection’s first weeks

    People with HIV are many times more infectious to their sexual partners in the weeks or months just after they acquire the virus than they are later on, a study in Uganda demonstrates conclusively.

  13. Frozen in Time: Gas puts mice metabolically on ice

    Researchers have induced a hibernation-like state in mice by exposing them to low concentrations of hydrogen sulfide.

  14. Tech

    Double bubble comes off in a pinch

    By nestling droplets inside larger droplets, scientists have created a new strategy for encapsulating food additives and fragrances.

  15. Mood Brighteners: Light therapy gets nod as depression buster

    Brief periods of daily exposure to bright light are an effective treatment option for depression.

  16. Earth

    Coming Storms: Method predicts intensity of U.S. hurricane seasons

    A new computer model that analyzes summer-wind patterns can help predict whether the United States will suffer a damaging hurricane season.

  17. 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.

  18. Tech

    Special Treatment

    Researchers are developing nanosize metallic particles that can break down soil and groundwater contaminants faster and more cheaply than any other existing technology.

  19. Humans

    Letters from the April 23, 2005, issue of Science News

    The shark as red herring I’m sure you published “A Fishy Therapy,” (SN: 3/5/05, p. 154) in good faith, but I believe that claims for shark cartilage are not made seriously by anyone who studies the role of natural substances in cancer prevention. It was proved ineffective long ago. I think your article does a […]