Vol. 167 No. #10
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More Stories from the March 5, 2005 issue

  1. Healing secret lies in blood

    An unknown factor in blood may be the key to why young people and animals heal much faster than old ones do.

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  2. Earth

    Winged solution to biopollution?

    Government officials have released alien moths in hopes that they will rein in the spread of an aggressive climbing fern now invading some 100,000 acres in south Florida.

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  3. Health & Medicine

    Cell transplants make gains versus diabetes

    Transplanting insulin-making cells from a single cadaver into people with type 1 diabetes can reverse the disease in some people.

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  4. Earth

    Baking dirt to predict erosion after a fire

    Lab tests suggest that a wide variety of soils exposed to the heat of intense wildfires end up with a similar resistance to erosion, a finding that may help scientists model that process more accurately.

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  5. Archaeology

    Pottery points to ‘mother culture’

    The Olmec, a society that more than 3,000 years ago inhabited what is now Mexico's Gulf Coast, acted as a mother culture for communities located hundreds of miles away, according to a chemical analysis of pottery remains and local clays from ancient population sites in the area.

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  6. Astronomy

    Hole power

    New computer simulations and observations are adding to the evidence that supermassive black holes control the growth of the galaxies they inhabit, wielding an influence far beyond their gravitational grasp.

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  7. Health & Medicine

    Protein may aid stroke recovery

    Tests in mice have shown that erythropoietin, a red blood cell growth factor, can reverse brain damage caused by strokes.

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  8. Cytoplasm affects embryonic development

    The DNA in a fertilized egg's mitochondria may play a pivotal role in the organism's growth.

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  9. Physics

    Brutal Bubbles: Collapsing orbs rip apart atoms

    Spikes of heat and pressure in sonoluminescence caused by the implosions of light-emitting bubbles in liquids can strip atoms of electrons.

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  10. Health & Medicine

    Measuring HIV’s Cost: Treatment adds years, but many still miss out

    Medical care for people infected with HIV has already saved about 2 million years of life in the United States, but more than 200,000 HIV-infected Americans are not benefiting from drugs that could extend their lives.

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  11. Earth

    Warm Spell: Arctic algae record shift in climate

    Analyses of sediment samples taken from remote arctic lakes indicate that the climate across large swaths of the Northern Hemisphere has been warming for many decades.

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  12. Astronomy

    Nursery Pictures: Astronomers glimpse primordial clustering

    Astronomers have found the earliest traces of galaxy clustering, from a period just 1 billion years after the birth of the universe.

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  13. Animals

    Shortcut to Big Heart: Pythons build cardiac muscle in record time

    A Burmese python can boost its cardiac fitness—by bulking up its heart muscle 40 percent in two days—just by eating.

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  14. Planetary Science

    Martian Landscaping: Spacecraft eyes evidence of a frozen sea

    After analyzing images taken by the orbiting Mars Express spacecraft, researchers reported that a flat region near the Red Planet's equator holds a frozen ocean that was once the size of the North Sea.

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  15. Infectious Evolution: Ancient virus hit apes, not our ancestors, in the genes

    A potentially deadly infection wormed its way into the DNA of ancestral chimpanzees and gorillas between 4 million and 3 million years ago, thus altering the evolution of these African apes while keeping clear of human ancestors on that same continent.

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  16. Earth

    Straight Flush

    Scientists are evaluating the results of the flood they unleashed in the Grand Canyon last November, hoping that it will restore sandbars and beaches along the Colorado River just downstream of Arizona's Glen Canyon Dam.

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  17. Health & Medicine

    A Fishy Therapy

    Shark cartilage continues to be sold to fight cancer, even though its efficacy has not been confirmed by any major U.S. trials.

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  18. Humans

    Letters from the March 5, 2005, issue of Science News

    Way-up wander? It seems interesting that undersea flows have at least one characteristic different from rivers: “While river floods on land can create natural levees a few meters tall, the levees formed by [undersea] turbidity currents can grow up to 100 m[eters] high” (“Hidden Canyons,” SN: 1/1/05, p. 9). There are several sites on Mars […]

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