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Your search has returned 34 articles:
  • News

    Stepping Lightly: New view of how human gaits conserve energy

    For 200,000 or more years, the fine-tuned mechanics of human motion have enabled our species to traverse enormous distances on foot with remarkably little energy expenditure. Scientists have long pondered which specific qualities of walking and running render those means of getting around so efficient.

    Now, a pair of biomechanics theorists say that they've captured the...

    09/14/2005 - 12:43 Technology
  • News

    Forever Young: Digging for the roots of stem cells

    Researchers have now shown how a trio of proteins controls whether an embryonic stem cell takes an irreversible step toward developing into specific tissues or retains its raw potential to become a blood cell, bone cell, brain cell, or any other kind of cell.

    Stem cells' unique capacity to develop into any type of cell—a property known as pluripotency—underlies their medical promise....

    09/14/2005 - 11:50
  • News

    Noises On, Language Off: Speech impairment linked to unsound perception

    A common childhood language disorder stems from a brain-based difficulty in discerning the acoustic building blocks of spoken words, especially in noisy settings such as classrooms, a new study suggests.

    Researchers estimate that as many as 7 percent of U.S. elementary school students experience substantial problems in understanding what others say and in speaking comprehensibly,...

    09/14/2005 - 11:34
  • News

    Head-to-Head Comparison: Coils top clips in brain-aneurysm treatment

    Insertion of a tiny metal coil into a bleeding aneurysm in the brain appears safer in the long run for some patients than a more-established treatment that requires brain surgery, researchers find.

    A brain aneurysm—an abnormal bulge in a weakened blood vessel—is a tragedy in waiting. Aneurysms sometimes rupture, and the leaking blood can cause brain damage ending in...

    09/14/2005 - 10:55 Biomedicine
  • News

    Day-Glo Flowers: Some bright blooms naturally fluoresce

    Flowers such as four-o'clocks and portulacas invented the fluorescent look long before the psychedelic 1960s with its black light posters, new research shows.

    These species rank as the first flowers found to fluoresce naturally in people's visible-light range, says Fernando Gandía-Herrero of the University of Murcia in Spain. Some other plant pigments emit fluorescent light...

    09/14/2005 - 10:15 Plants