Vol. 172 No. #15
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More Stories from the October 13, 2007 issue

  1. Planetary Science

    Martian rovers survive storm

    Three months after being stymied by a planet-wide dust storm, NASA's twin Mars rovers are back in action.

  2. Exercise steps up as depression buster

    Aerobic exercise, done alone or in a group, eases depression almost as well as a common antidepressant does.

  3. Earth

    A different spin

    A change in the properties of Earth's mantle at high pressure and temperature may influence seismic waves in a novel way.

  4. Health & Medicine

    Diabetes precursor may be checked by omega-3 fatty acids

    Omega-3 fatty acids in the diet might fend off diabetes in children prone to the disease.

  5. Anthropology

    Ancient DNA moves Neandertals eastward

    Evidence from mitochondrial DNA indicates that Neandertals lived 2,000 kilometers farther east than previously thought.

  6. Earth

    Arctic sea ice falls to modern low

    The area of sea ice in the Arctic is at its lowest in nearly three decades of satellite monitoring.

  7. Health & Medicine

    Antibiotic improves recovery from stroke

    An antibiotic called minocycline seems to limit brain damage and disability in stroke patients.

  8. Physics

    Light does some weird math

    Adding a photon to a light pulse then taking one out gives a different result from doing the same operations the other way around.

  9. Animals

    Eat a Killer: Snake dines safely with strategic delays

    An Australian snake kills dangerous frogs then waits for their defensive chemicals to degrade before eating them.

  10. Shifty Talk: Probing the process of word evolution

    Words change more quickly over the millennia the less frequently they are used, a quantitative result that may aid in reconstructing old languages and predicting future changes.

  11. Astronomy

    Sunstruck: Solar hurricanes rip comet’s tail

    Images from a spacecraft show a magnetic hurricane from the sun severing a comet's ion tail.

  12. Health & Medicine

    Moving up the Charts: Drug-resistant bug invades military, civilian hospitals

    Acinetobacter baumannii, a common bacterium, is becoming more virulent and drug resistant in hospitals.

  13. Humans

    Mice, Magnetism, and Reactions on Solids

    The 2007 Nobel prizes in the sciences recognized research in genetics, materials science, and surface chemistry.

  14. Paleontology

    Fossil mystery solved?

    Experiments in a Florida swamp show how aquatic creatures can get trapped and preserved in amber, a form of hardened tree sap.

  15. Spying Vision Cells: Eye’s motion detectors are finally found

    Primates, like other mammals, possess specialized retinal cells that detect motion.

  16. Tech

    Disappearing Ink

    Coming to your tattoo parlor soon: New inks that allow clients to have their designs cleanly erased if embarrassment or regret sets in.

  17. Earth

    Invasive, Indeed

    Some people may live lightly on the land, but the demands of the world's population as a whole consume nearly a quarter of Earth's total biological productivity.

  18. Humans

    Letters from the October 13, 2007, issue of Science News

    Another idea blown . . . Conservation by America is not going to decrease global warming (“Asian Forecast: Hazy, Warmer—Clouds of pollution heat lower atmosphere,” SN: 8/4/07, p. 68). We need to imitate known global-cooling events, such as the Krakatoa volcano explosion, which spread sunlight-reflecting dust into the stratosphere in 1883. A hydrogen bomb exploded […]