Vol. 166 No. #13 Archives

More Stories from the September 25, 2004 issue

  1. Materials Science

    Heat-controlled implant delivers insulin on demand

    The field of drug delivery is literally heating up, with the development of a new polymer implant that releases insulin in response to changes in temperature.

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  2. Health & Medicine

    Hepatitis B vaccine linked to MS

    People who develop multiple sclerosis are more likely than others to have received a hepatitis B vaccination in recent years.

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  3. Humans

    Rembrandt’s eye saw no depth

    The 17th-century Dutch artist Rembrandt lacked stereoscopic vision, an optical analysis of his self-portraits suggests.

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  4. Chemistry

    Bacteria send out molecular scrounger for copper

    Scientists have discovered the organic molecule that bacteria use to take up copper, which the microbes then use to chemically crack methane.

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  5. Tech

    Transmuting a powerful poison

    A new chemical process for fuel cells powered by hydrocarbons eliminates carbon monoxide that would clog fuel-cell electrodes while also extracting energy from the troublesome gas.

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  6. Physics

    Orbiting relativity test gets slow start

    Unexpected but necessary adjustments to a satelliteborne test of relativity theory have slashed the time available to collect data.

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  7. Marrow cells take up residence in wounds

    Bone marrow–derived cells linger in skin wounds much longer than previously thought, aiding in healing.

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  8. Tech

    Bartending lessons for microassembly

    Engineers have demonstrated the feasibility of quickly assembling identical microcircuit components by agitating subunits in a liquid.

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  9. Paleontology

    Big Gulp? Neck ribs may have given aquatic beast unique feeding style

    The fossilized neck bones of a 230-million-year-old sea creature have features suggesting that the animal's snakelike throat could flare open and create suction to pull in prey.

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  10. Health & Medicine

    Sleep on It: Fitful slumber tied to diabetes risk

    Disturbed slumber, or sleep apnea, appears to make people more susceptible to certain conditions that lead to diabetes.

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  11. Plants

    Morphinefree Mutant Poppies: Novel plants make pharmaceutical starter

    A Tasmanian company has developed a poppy that produces a commercially useful drug precursor instead of full-fledged morphine, and a research team now reports how the plant does it.

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  12. Physics

    Spooky Timing: Quantum-linked photons coordinate clock ticks

    Physicists have demonstrated a new technique for bringing distant clocks into closer synchronization by means of entangled photons whose quantum properties are mysteriously correlated.

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  13. Roma Record: Paths of the Gypsy population’s diasporas

    Tracking genetic mutations has given researchers a tentative picture of the migration patterns of the Roma, or Gypsies, over the last millennium.

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  14. Health & Medicine

    Walking Away from Dementia: Moderate exercise protects aging minds

    Two fresh studies strengthen the case that physical activity, including walking at a moderate pace, protects the aging brain from cognitive decline and dementia.

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  15. Earth

    Deep Squeeze: Experiments point to methane in Earth’s mantle

    Although today's fossil fuel reserves reside in Earth's crust, a new study suggests that hydrocarbon fuel might also nestle deep in the mantle, at depths of 100 kilometers or more.

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  16. Tech

    Hungry for Nano

    The food industry is turning to nanotechnology as it searches for innovations that could bring safer, healthier, and tastier products to consumers.

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  17. Physics

    Information, Please

    Understanding whether the information swallowed by black holes is destroyed forever may provide physicists with new clues for unifying gravity and quantum theories.

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  18. Humans

    Letters from the September 25, 2004, issue of Science News

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