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Your search has returned 18 articles:
  • News

    A really cool map

    This infrared image of Saturn's rings, released by NASA on Sept. 2, provides the most detailed temperature map ever taken of the icy particles encircling the planet.

    Taken by the Cassini spacecraft on July 1, the false-color image shows the unlit surface of the rings, where temperatures vary from 70 kelvins (blue) to 110 kelvins (red). Water freezes at 273 kelvins. The opaque...

    09/08/2004 - 10:08 Planetary Science
  • News

    Super Bird: Cooing doves flex extra-fast muscles

    The power behind a ring dove's trill belongs to the fastest class of vertebrate muscles known, reports a team of physiologists. This is the first demonstration of superfast muscles in a bird, the researchers say.

    These muscles contract some 10 times as fast as the muscles that vertebrates typically use for running, says Coen Elemans of Wageningen University in the Netherlands....

    09/08/2004 - 10:04 Animals
  • News

    A Very Spatial Brain Defect: Gene disorder blocks neural path for vision

    Among its many unusual symptoms, the genetic disorder called Williams syndrome robs people of depth perception and the ability to visualize how different parts assemble into larger objects, as in a simple jigsaw puzzle.

    An unusual scarcity of tissue in a small corner of the visual system underlies this particular problem in individuals with Williams syndrome, a new brain-imaging study...

    09/08/2004 - 09:56
  • News

    Falling into Place: Atom mist yields nanobricks and mortar

    Nanotechnologists envision using tiny structures to create ultrastrong materials and to build memory chips that store entire libraries. But these visions require making matter behave in exceptionally orderly ways.

    Now, materials scientists Jagdish Narayan and Ashutosh Tiwari of North Carolina State University (NCSU) in Raleigh have induced tiny particles, or nanodots, of nickel...

    09/08/2004 - 09:55 Materials
  • News

    An Exploitable Mutation: Defect might make some lung cancers treatable

    Nonsmokers who develop lung cancer are more likely than their smoking counterparts to have a mutation in a gene called EGFR, a new study shows. The discovery could be good news for these nonsmokers because tumors that have this genetic defect—which fosters aberrant cell growth—appear highly responsive to a drug called gefitinib.

    The findings have already triggered genetic screening to...

    09/08/2004 - 09:54 Biomedicine
  • News

    Model Growth: Simulations expose branching nature of polymer crystals

    The intricate shapes of snowflakes have long fascinated scientists, but water isn't the only fluid that freezes into elaborate crystal structures. Polymers and metal alloys do the same. Now, scientists in the United States and Hungary have uncovered previously unknown facets of the physics underlying such crystal growth.

    Using computer models, the researchers simulated a polymer...

    09/08/2004 - 09:51 Materials
  • News

    Cool Harvest: Frost on sea ice may boost atmosphere's bromine

    Frost flowers, the delicate crystals that sometimes grow atop fresh sea ice, can be a substantial source of ozone-destroying bromine in the lower atmosphere near the poles, researchers suggest.

    Over tropical and temperate seas, salt spray from breaking waves provides most of the low-altitude atmospheric bromine. The origin of bromine over ice-bound oceans has remained a mystery,...

    09/08/2004 - 09:42 Earth
  • News

    No Deep Breathing: Air pollution impedes lung development

    Spending one's childhood in a community with polluted air stalls lung development roughly as much as does having a mother who smokes, according to a study of children growing up in southern California.

    That finding lengthens the list of negative effects on health that stem from bad air (SN: 8/2/03, p. 72: Air Sickness), but it also suggests that antipollution measures could prevent...

    09/08/2004 - 09:33 Earth & Environment
  • Letters to the Editor

    Letters from the September 11, 2004, issue of Science News

    Say what?

    I don't think anyone should be surprised that squirrels have figured out how to say "nyah, nyah" to rattlesnakes ("Ultrasound alarms by ground squirrels," SN: 7/3/04, p. 14: Ultrasound alarms by ground squirrels). After all, it's what they've been saying to cats, dogs, and bird-feeder owning humans for years.

    R. Kelly WagnerAustin, Texas

    Weather or not

    It is...

    09/07/2004 - 19:33 Humans & Society
  • News

    Meteorites may have delivered phosphorus

    From Philadelphia, at a meeting of the American Chemical Society

    Phosphorus is an essential atomic ingredient in DNA, RNA, and cell membranes. But, compared with other must-have elements such as carbon, hydrogen, oxygen, and nitrogen, phosphorus is the least abundant on Earth, says Matthew Pasek of the University of Arizona in Tucson. With so little phosphorus in the terrestrial...

    09/07/2004 - 15:43 Chemistry