Vol. 175 No. #9 Archives

More Stories from the April 25, 2009 issue

  1. Space

    Asteroid tracked from space to Earth

    For the first time, researchers followed an asteroid from space to its crash into Earth, providing the opportunity to study an asteroid in a new way.

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  2. Health & Medicine

    Male circumcision fends off the most common STDs

    Male circumcision prevents some genital herpes and human papillomavirus infections, a study in Ugandan adolescent boys and men shows.

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  3. Health & Medicine

    How herpes re-rears its ugly head

    Researchers identify a key player in the reactivation of herpes simplex virus type 1.

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  4. Space

    Ice cubes in space

    Planetary scientists have determined the composition and orbits of two moons at the fringes of the solar system, finding that the bodies were created when an impactor struck the dwarf planet that they now orbit.

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  5. Health & Medicine

    Autism immerses 2-year-olds in a synchronized world

    By age 2, kids with autism focus on synchronized physical events, such as a person’s moving lips accompanied by sounds, rather than on eye movements and other social cues, a new study suggests.

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  6. Life

    Louse-y genome surprise

    Blood-sucking body lice have an odd arrangement of mitochondrial genes.

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  7. Health & Medicine

    Parasites hinder immunity against cholera

    Harboring intestinal parasites seems to limit a person’s ability to fend off cholera, a new study conducted in Bangladesh shows.

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  8. Life

    Genes help monarchs migrate

    At least 40 genes help monarch butterflies find their way to overwintering sites in Mexico.

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  9. Math

    Chicks do arithmetic

    Using the natural inclination of young chickens to cluster in large groups, researchers show that the birds are hatched with a numerical sense.

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  10. Physics

    Spin control for technology

    Long-lived helix offers a new way to keep electron spin stable and in sync

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  11. Space

    Heavyweight galaxies in the young universe

    New observations of full-grown galaxies in the young universe may force astrophysicists to revise their leading theory of galaxy formation, at least as it applies to regions where galaxies congregate into clusters.

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  12. Health & Medicine

    HPV screen beats Pap smear

    A test for human papillomavirus outperforms the standard Pap smear in catching precancerous cervical lesions, a study of women age 30 and over shows.

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  13. Chemistry

    Prions are common, at least in yeast

    A new study of shape-shifting proteins in baker’s yeast reveals that prions are common and may help organisms survive in changing conditions.

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  14. Life

    Cells renew in the human heart

    Carbon 14 from Cold War–era nuclear bomb tests allowed researchers to track cell birth.

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  15. Materials Science

    Viruses could power devices

    Viruses — the biological kind — could be used to construct more efficient, environmentally friendly lithium ion batteries

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  16. Anthropology

    Hobbit brain small, but organized for complex intelligence

    Evolution may have endowed a controversial species with small but humanlike brains equipped to support advanced thinking

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  17. Animals

    Chimps ambidextrous when digging wells

    A survey of water-collection holes dug on the banks of an African river by wild chimpanzees indicates that, unlike people, these apes don’t have a preference for using either the right or left hand on manual tasks.

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  18. Science Future for April 25, 2009

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  19. Logical Labyrinths by Raymond M. Smullyan

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  20. Heatstroke: Nature in an Age of Global Warming by Anthony D. Barnosky

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  21. Birth Day: A Pediatrician Explores the Science, the History, and the Wonder of Childbirth by Mark Sloan

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  22. The Unwell Brain: Understanding the Psychobiology of Mental Health by F. Scott Kraly

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  23. Book Review: An Orchard Invisible: A Natural History of Seeds by Jonathan Silvertown

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  24. Book Review: Out of Our Heads: Why You Are Not Your Brain, and Other Lessons from the Biology of Consciousness by Alva Noë

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  25. Science needs ace communicators and politicians

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  26. Shared Differences

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  27. Specialis Revelio!

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  28. Strings Link the Ultracold with the Superhot

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  29. Letters

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  30. Science Past from the issue of April 25, 1959

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  31. Why Sh*t Happens: The Science of a Really Bad Day by Peter J. Bentley

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