All the major regions of the polar ice sheets except one have been losing mass since 1992, according to a study that pulls together several independent measurement methods.
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The genome of the human cytomegalovirus (HCMV) was first sequenced over 20 years ago, but researchers have now discovered that the common pathogen has a surprisingly complex protein-coding capacity as well.
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The looming possibility of deep, across-the-board budget cuts—known as sequestration—poses historic risks for U.S. research and development, experts said at a Capitol Hill briefing organized by AAAS. Unless lawmakers find a compromise by year’s end to avert the cuts, the crippling impact could be felt for a generation, they warned, even as other nations are increasing R&D investments.
The first concussion came playing football in high school, the second playing the game at Annapolis, and a third playing rugby. It meant the end of contact sports for U.S. Navy Captain and doctor James L. Hancock, but not the end of his risk for traumatic brain injury.
Early humans were lashing stone tips to wooden handles to make spears and knives about 200,000 years earlier than previously thought, according to a study in the 16 November issue of Science.
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