ScienceDaily: Latest Science News |
- U.S. death rate falls for 10th straight year
- Radiation risks to health: A joint statement from leading scientific experts
- Is space like a chessboard?
| U.S. death rate falls for 10th straight year Posted: 19 Mar 2011 06:12 AM PDT The age-adjusted death rate for the U.S. population fell to an all-time low of 741 deaths per 100,000 people in 2009 -- 2.3 percent lower than the 2008 rate, according to preliminary 2009 death statistics. This marks the 10th year in a row that U.S. deaths rates have declined. |
| Radiation risks to health: A joint statement from leading scientific experts Posted: 19 Mar 2011 05:55 AM PDT The growing concern surrounding the release of radiation from an earthquake and tsunami-stricken nuclear complex in Japan has raised fears of radiation exposure to populations in North America from the potential plume of radioactivity crossing the Pacific Ocean. Experts have issued a statement to help Americans understand their radiation-related health risks. |
| Posted: 19 Mar 2011 05:55 AM PDT Unveiling a concept that is at once novel and deceptively simple, physicists have found that two-valued spin can arise from having two types of tiles -- light and dark -- in a chessboard-like space. And they found this model working on a surprisingly practical problem, how to make better transistors out of a new material called graphene. |
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