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Your search has returned 24 articles:
  • Feature

    Energy in Motion

    Occasionally, scientists stumble upon what seems to be a free lunch. But they're not concerned about possibly violating the laws of economics. It would be much more shocking to break the laws of physics.To physicists, the no-free-lunch rule is precious. One form of it is the first law of thermodynamics, which says that energy cannot be created from nothing. The second law of thermodynamics goes...
    02/18/2008 - 11:18 Chemistry
  • Food for Thought

    Salmon Safety

    Two recent reports urge more fish consumption, including farmed salmon. But previous studies had warned against farmed salmon because of high levels of organic pollutants. So, do we eat it or don't we?A report published in Science 3 years ago warned that some kinds of salmon should be eaten at most once every 5 months. But in October 2006, an article in the Journal of the American...
    01/15/2007 - 23:14 Nutrition
  • Letters to the Editor

    Letters from the April 8, 2006, issue of Science News

    Hot and cold"Warming climate will slow ocean circulation" (SN: 2/4/06, p. 77) makes me wonder, Does continental drift cause occasional changes to the ocean's currents? Would major reorganizations of ocean currents tend to cause ice ages by temporarily disrupting the flow of warm water that normally keeps the ice at bay? Would simulations of past...
    04/05/2006 - 19:39 Humans & Society
  • News

    Moon spray

    Geysers of icy material are erupting from Saturn's tiny moon Enceladus, providing incontrovertible proof that the moon is geologically active. Recent images taken by the Cassini spacecraft, which has toured the Saturnian system since July 2004, show the jets shooting far above the icy satellite's south-polar region.A spectrometer on Cassini had previously detected a large cloud of water vapor...
    01/02/2006 - 17:04 Planetary Science
  • Letters to the Editor

    Letters from the December 17, 2005, issue of Science News

    C plusEwan Cameron, who in 1971 began to collaborate with Linus Pauling on vitamin C and cancer, typically initiated patients with 10 grams per day of vitamin C given intravenously for about 2 weeks, followed by an oral dosage continued indefinitely. The two Mayo Clinic trials referred to in "Vitamin C may treat cancer after all" (SN: 10/15/05, p. 253)...
    12/14/2005 - 14:57 Humans & Society
  • Letters to the Editor

    Letters from the July 2, 2005, issue of Science News

    Chlorine's fate?"Special Treatment: Tiny technology tackles mega messes" (SN: 4/23/05, p. 266), on the reaction of nanoparticles of iron with trichloroethane (TCE) contaminating an aquifer, states that the TCE is converted "into ethane." What happens to the chlorine stripped off the TCE? Is it converted into insoluble inorganic compounds or is it...
    06/28/2005 - 09:07 Humans & Society
  • Feature

    Science News Challenge

    Every word required for this puzzle appeared in a Science News article during 2003.If you need a hint, check the print article by going to the volume and page number listed after each clue or find the online version of the article by clicking on the link. An asterisk indicates that the article is available free to all visitors to Science News Online. Subscribers who have...
    12/17/2003 - 12:47 Humans & Society
  • Feature

    Science News Challenge

    Every word required for this puzzle appeared in a Science News article during 2003.If you need a hint, check the print article by going to the volume and page number listed after each clue or find the online version of the article by clicking on the link. An asterisk indicates that the article is available free to all visitors to Science News Online. Subscribers who have...
    12/17/2003 - 12:47 Humans & Society
  • Feature

    Science News of the Year 2003

    Fighting off the virusesA couple of decades ago, if someone had asked whether you'd heard about "that new virus," you'd have know that they were concerned about a health threat. This year, you'd have needed to ask, "Medical or computer?" On both viral fronts, 2003 was eventful. A new viral disease emerged in China, and travelers spread it around the globe. A series of novel viruses and other...
    12/16/2003 - 12:27 Humans & Society
  • Feature

    Science News of the Year 2003

    Fighting off the virusesA couple of decades ago, if someone had asked whether you'd heard about "that new virus," you'd have know that they were concerned about a health threat. This year, you'd have needed to ask, "Medical or computer?" On both viral fronts, 2003 was eventful. A new viral disease emerged in China, and travelers spread it around the globe. A series of novel viruses and other...
    12/16/2003 - 12:27 Humans & Society