Vol. 163 No. #9 Archives

More Stories from the March 1, 2003 issue

  1. Tech

    Worms may spin silk fit for skin

    Silk cocoons could become puffs of valuable human proteins if a new bioengineering method pans out.

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  2. Chemistry

    A safer antioxidant?

    Scientists have developed a synthetic antioxidant that won't, at high doses, foster the tissue damage the compounds are meant to prevent.

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  3. Materials Science

    Ceramic rebounds from stressful situations

    The ceramic titanium silicon carbide can fully recover after being compressed to a degree that would leave most ceramics shattered and most metals permanently deformed.

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  4. Dolly, first cloned mammal, is dead

    Dolly, the first clone of an adult mammal, has been euthanized after acquiring a severe lung infection.

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  5. Health & Medicine

    Designer RNA stalls hepatitis in mice

    Using strips of synthetic RNA that interfere with normal gene action, scientists working with mice have stopped the progression of hepatitis.

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  6. Health & Medicine

    HIV in breast milk can be drug resistant

    HIV-positive women who receive the drug nevirapine during pregnancy often have HIV that is resistant to the drug in their breast milk after they give birth.

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  7. Good taste in men linked to colon risks

    Men with exceptionally sensitive powers of taste may face extra health risks, such as colon cancer.

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  8. Materials Science

    Technique may yield vocal cord stand-in

    A plastic material used in some biological implants could someday form a foundation for tissue that can repair or replace human vocal cords.

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  9. Stem Cell Surprise: Blood cells form liver, nerve cells

    Human blood contains stem cells that can be transformed outside the body into a variety of cell types, suggesting that a person's blood could someday provide replacement cells for that individual's damaged brain or kidney.

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  10. Anthropology

    Pieces of a Disputed Past: Fossil finds enter row over humanity’s roots

    Two new fossil discoveries have fueled scientific debates about the evolutionary status of a pair of species traditionally considered to have been our direct ancestors, Homo habilis and Homo erectus.

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  11. Earth

    Sexual Hang-Up: Fish hormones change when oxygen is scarce

    Oxygen deprivation—an escalating problem in freshwater ecosystems worldwide—tampers with sex hormones in carp and might underlie the decline in some fish and amphibian species.

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  12. Materials Science

    Waterproof Coats: Materials repel water with simplicity, style

    Researchers have produced new types of water-repelling surfaces, including one that's colorful and another made of inexpensive plastic.

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  13. Health & Medicine

    Mixed Results: AIDS vaccine falters in whites, may help blacks

    In its first large test, an AIDS vaccine has failed to shield an at-risk population from acquiring AIDS.

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  14. Ecosystems

    After Invasions: Can an ant takeover change the rules?

    A rare before-and-after study of a takeover by an invasive ant species shows the interloper quickly disassembling the basic rules of the invaded community.

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  15. Humans

    Jonathan Eberhart (1942–2003)

    After chronicling space science and exploration for 3 decades on behalf of Science News, Jonathan Eberhart died last week from complications of multiple sclerosis.

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  16. Earth

    Ancient Taint: Likely source of old dioxins identified

    Lab experiments show that the burning of peat from coastal areas of Scotland could be responsible for the enigmatic concentrations of dioxins sometimes found in pre-20th-century soils.

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  17. Astronomy

    Mature Before Their Time

    Some galaxies were in place and forming stars at a prolific rate when the universe, now 13.7 billion years old, was just an 800-million-year-old whippersnapper.

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  18. Earth

    A Safe Solution

    A home-based technique for treating microbe-contaminated water with chlorine solution could save millions of lives in countries that are currently unable to provide residents with safe drinking water.

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