Uncategorized

  1. Astronomy

    Weighing In on a Star: A stellar size limit

    A new study suggests that no star in our galaxy can weigh more than 150 times the mass of the sun.

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  2. Planetary Science

    Slowpoke: Atmosphere put brakes on meteorite that formed famed crater

    The extraterrestrial object that gouged out Arizona's Meteor Crater about 50,000 years ago struck at a speed much slower than most scientists had previously proposed.

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  3. Monkey See, Monkey Think: Grape thefts instigate debate on primate’s mind

    Rhesus monkeys treat a competitor's averted eyes as a license to steal his or her food.

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  4. 19525

    Evidence of animals sensing where people are looking and what they’re seeing is interesting yet hardly new. For years, I have observed that wild rabbits will remain motionless as long as I stare in their direction. But as soon as I avert my eyes or turn my head, the rabbit is gone. Clearly, they correctly […]

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  5. Health & Medicine

    Blindness Hazard: Gene variant tied to macular degeneration

    People who make a particular form of an immune system protein have a heightened risk of developing old-age blindness.

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  6. Health & Medicine

    Injections cut need for HIV drugs

    An experimental vaccine, when given to people infected with HIV, appears to reduce their dependence on antiviral drugs.

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  7. Humans

    Death can outdo ABCs of prevention

    Abstinence and monogamy may deserve little, if any, credit for the recent drop in the proportion of Ugandans who are infected with HIV.

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  8. Humans

    Letters from the March 12, 2005, issue of Science News

    Cheaters like us? The model for the emergence of a population of “cheaters” out of a population of “cooperators” described in “When Laziness Pays: Math explains how cooperation and cheating evolve” (SN: 1/15/05, p. 35) gives a fresh viewpoint on existing ecosystems—and much more. Might the evolution of asymmetric modern sex from symmetric DNA exchange […]

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  9. Health & Medicine

    Inner-brain electrode may curb depression

    Deep-brain electrical stimulation has shown promise in treating severe depression.

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  10. Astronomy

    Radiation from a baby star

    X-ray telescopes have captured the earliest and clearest view of the core of a gas cloud about to transform into a star.

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  11. Master gene found for insect smell

    A single gene may oversee the sense of smell in a variety of insect species.

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  12. Anthropology

    Inside view of our wee, ancient cousins

    A tiny, humanlike species that inhabited an Indonesian island more than 20,000 years ago possessed a brain that shared some organizational features with Homo erectus, a large-brained human ancestor that thought in complex ways.

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