Vol. 166 No. #13
Archive Issues Modal Example

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.

  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.

  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.

  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.

  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.

  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.

  7. Marrow cells take up residence in wounds

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

  8. Tech

    Bartending lessons for microassembly

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

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  18. Humans

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

    More of less is more The counterintuitive finding that atrazine is more likely to kill tadpoles when it is highly diluted (“Just a Tad Is Too Much: Less is worse for tadpoles exposed to chemicals,” SN: 7/10/04, p. 20: Just a Tad Is Too Much: Less is worse for tadpoles exposed to chemicals) reminds me […]