Vol. 171 No. #25

More Stories from the June 23, 2007 issue

  1. Health & Medicine

    Diabetes drug might hike heart risk

    People who take rosiglitazone, a popular diabetes drug marketed as Avandia, may face an increased risk of heart attack.

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  2. Archaeology

    Ancient beads found in northern Africa

    Perforated shells found in a Moroccan cave indicate that northern Africans made symbolic body ornaments 82,000 years ago, long before Europeans did.

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  3. Animals

    Moths mimic ‘Don’t eat me’ sounds

    Moths that make clicking noises at predatory bats are mimicking a defensive signal made by other moths that click and also taste bad.

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  4. Earth

    Tree rings tell tale of megadroughts

    Tree rings in ancient timber show that the Colorado Plateau experienced a 60-year drought in the 12th century.

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  5. Materials Science

    Heal thyself—again and again

    A new self-healing material can repeatedly repair damage at the same spot.

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  6. Animals

    Clownfish noisemaker is new to science

    Clownfish make "pop-pop-pop" noises at each other by clacking their teeth together in a novel way.

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  7. New player in cancer risk

    RNA snippets of a newly discovered type could be involved in the mechanisms of cancer.

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  8. Health & Medicine

    Fluorine highlights early tumors

    Microscopic, fluorine-packed particles can make small, cancerous growths easier to detect.

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  9. Crossing the Line: Technique could treat brain diseases

    With the help of a molecule from the rabies virus, scientists have for the first time selectively ferried a drug across the blood-brain barrier to treat a neurological disease in mice.

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  10. Computing

    Mapping a Medusa: The Internet spreads its tentacles

    After tracking how digital information weaves around the world, researchers have concluded that, structurally speaking, the Internet looks like a medusa jellyfish.

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  11. Health & Medicine

    Warning Sign: River blindness parasite shows resistance

    The parasitic worm that causes river blindness seems to be developing resistance to the only drug that controls it.

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  12. Paleontology

    Winged dragon

    A quarry on the Virginia–North Carolina border has yielded fossils of an unusual gliding reptile that lived in the region about 220 million years ago.

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  13. Materials Science

    Needling Cells: Stem cells could take their cues from silicon nanowires

    Scientists have grown mouse stem cells on a bed of silicon nano-needles, hoping that they will be able to guide the cells' development through electrical stimulation.

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  14. Chemistry

    Beyond Ethanol: Synthetic fuel offers promising alternative

    A faster, simpler manufacturing technique could make a synthetic biofuel into an even stronger competitor to ethanol.

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  15. Paleontology

    Jurassic CSI: Fossils indicate central nervous system damage

    Fossils found in the head-thrown-back position, the so-called "dead bird" pose, probably died from central nervous system damage.

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  16. Animals

    Profiles in Courtship: Flirting male fish show their best sides

    Courting male guppies that sport a tad more orange on one side of their bodies than on the other tend to flash that brighter side at females.

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  17. Earth

    Storm Center

    Scientists aboard planes that flew into the cores of Katrina and other hurricanes in 2005 collected unprecedented data on the structure and development of the massive storms.

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  18. Health & Medicine

    Stents Stumble

    After a meteoric rise, stents coated with drugs to prevent renarrowing of clogged arteries have begun to fall from favor among cardiologists.

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  19. Humans

    Letters from the June 23, 2007, issue of Science News

    Bad start In “Violent Justice: Adult system fails young offenders” (SN: 4/21/07, p. 243), an association is found between young offenders being tried as adults and increased criminal offenses later. The implication is made that one thing causes the other. Perhaps a better interpretation of the data would be that, because not every young offender […]

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