Vol. 172 No. #11
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More Stories from the September 15, 2007 issue

  1. Health & Medicine

    How platelets help cancer spread

    A tumor cell protein influences blood platelets in a way that helps a cancer spread through the body.

  2. Astronomy

    Major merger

    Four galaxies are ramming into each other in one of the biggest cosmic collisions ever recorded.

  3. Perfect pitch isn’t so perfect in many

    Among people with perfect pitch, the most common error seems to be misidentifying G flat as A, the note on which orchestras traditionally tune.

  4. Anthropology

    Advantage: Starch

    An enhanced ability to digest starch may have given early humans an evolutionary advantage over their ape relatives.

  5. Archaeology

    Ancient city grew from outside in

    A 6,000-year-old city in what's now northeastern Syria developed when initially independent settlements expanded and merged, unlike other nearby cities that grew from a core outward.

  6. Chemistry

    Nanoparticles multitask

    Magnetite nanoparticles have catalytic properties that may be useful in wastewater treatment and biomedical assays.

  7. Astronomy

    Bloated planet

    A newly discovered exoplanet is the largest and lowest-density such object yet found.

  8. Health & Medicine

    Blood vessel growth factor also does housekeeping

    A growth factor that promotes blood vessel development also maintains normal blood vessel health, perhaps explaining the vascular side effects of some cancer drugs.

  9. Physics

    Alliance of Opposites: Electrons and positrons make new molecule

    Positronium, consisting of electrons and their antimatter counterparts, has been made into a molecular form.

  10. Planetary Science

    Survivor: Extrasolar planet escapes stellar attack

    An extrasolar planet survived after its aging parent star ballooned into a red giant that almost engulfed it.

  11. Animals

    Fish Switch: Salmon make baby trout after species, sex swap

    Salmon implanted with trout reproductive tissue bred to produce a generation of normal rainbow trout.

  12. Health & Medicine

    Debate Renewed: Diabetes drug ups heart risk

    A popular diabetes drug significantly increases the risk of heart failure and heart attack in those who take it.

  13. Earth

    Grazing on the Periodic Table: Some ancient microorganisms lived on a diet of pure sulfur

    Microorganisms that lived 3.5 billion years ago obtained energy by metabolizing pure sulfur.

  14. Health & Medicine

    Brain Sabotage: Alzheimer’s protein may spawn miniseizures

    Amyloid-beta, a protein implicated in Alzheimer's disease, causes misfiring of neurons and minor brain seizures in mice.

  15. Tech

    Spot On: Printing flexible electronics one nanodot at a time

    A new high-resolution printing technique could make flexible electronics such as plastic displays and solar cells easier to produce.

  16. Consciousness in the Raw

    Observations of children born without most of the brain's outer layer, or cortex, and evidence from animal studies suggest that a basic form of consciousness may arise from the brain stem alone.

  17. Health & Medicine

    Curry Power

    A component of the spice turmeric, the color-giving ingredient in yellow curries, may help prevent and possibly treat Alzheimer's disease.

  18. Humans

    Letters from the September 15, 2007, issue of Science News

    Talk talk talk “Hidden Smarts: Abstract thought trumps IQ scores in autism” (SN: 7/7/07, p. 4) didn’t mention that traditional IQ tests are in one sense “language” tests. The Ravens test doesn’t involve language processing in a typical manner. A person with a language disorder, as an autistic person is assumed to be, would do […]