Propagation of earthquake waves within the Earth is not uniform. Experiments indicate that the velocity of shear waves (s-waves) in Earth’s lower mantle between 660 and 2900 km depth is strongly dependent on the orientation ...
Earth Sciences
Apr 13, 2009
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Do zoos have serious programs to save endangered species, besides putting a few captives on display for everyone to see? (Kelly Traw, Seattle)
Ecology
Apr 13, 2009
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At least one of Motorola's new phones will appeal to consumers searching for "green" products.
Consumer & Gadgets
Apr 13, 2009
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We're not finished yet. Even today, scientists say that human beings are continuing to evolve as our genes respond to rapid changes in the world around us. In fact, the pressures of modern life may be speeding up the pace ...
Evolution
Apr 13, 2009
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This is what you get when politicians keep their comments to 140 characters or less: "We need to cut spending! Holy Cow! A novel idea in Washington."
Internet
Apr 13, 2009
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(PhysOrg.com) -- Our modern age has become accustomed to regular improvements in information technology, says Slava Rotkin, but these advances do not come without a cost.
Nanophysics
Apr 13, 2009
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In 1994, University of Utah mathematician Ken Golden went to the Eastern Weddell Sea for the Antarctic Zone Flux Experiment. The sea's surface is normally covered with sea ice, the complex composite material that results ...
Mathematics
Apr 13, 2009
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Yuan et al. have identified another anti-cancer effect of the "longevity" protein SIRT1. By speeding the destruction of the tumor promoter c-Myc, SIRT1 curbs cell division. The study will be published online April 13 and ...
Cell & Microbiology
Apr 13, 2009
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Applied scientists at the Harvard School of Engineering and Applied Sciences (SEAS) in collaboration with researchers from Hamamatsu Photonics in Hamamatsu City, Japan, have demonstrated, for the first time, lasers in which ...
Optics & Photonics
Apr 13, 2009
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