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5 December 2013 11:26 am ,
Vol. 342 ,
Researchers have been hot on the trail of the elusive Denisovans, a type of ancient human known only by their DNA and...
Thousands of scientists in the Russian Academy of Sciences (RAS) are about to lose their jobs as a result of the...
Dyslexia, a learning disability that hinders reading, hasn't been associated with deficits in vision, hearing, or...
Exotic, elusive, and dangerous, snakes have fascinated humankind for millennia. They can be hard to find, yet their...
Researchers have sequenced and analyzed the first two snake genomes, which represent two evolutionary extremes. The...
Snake venoms are remarkably complex mixtures that can stun or kill prey within minutes. But more and more researchers...
At age 30, Dutch biologist Freek Vonk has built up a respectable career as a snake scientist. But in his home country,...
Since arriving on the island of Guam in the 1940s, the brown tree snake ( Boiga irregularis ) has extirpated native...
- 5 December 2013 11:26 am , Vol. 342 , #6163
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ScienceShot: Twisters Spread Out
14 December 2010 1:03 pm
Tornado Alley just got bigger. A swath of the Great Plains between west Texas and Minnesota, the loosely defined region gets its nickname from the substantial amount of tornado activity that occurs there. But now researchers have found that many locales in Dixie are more twister-prone than Kansas. By tallying tornado occurrence for each square kilometer of the lower 48 states from 1950 through 2007, the team identified sites in large patches of south-central Mississippi and central Arkansas that have tornadoes pass within 25 miles of them at least once each year (as depicted in the orange and deep red areas of the map above). Such rates are similar to those seen in tornado hotspots of the Great Plains. Sites in Smith County, Mississippi, historically the most twister-afflicted area of the nation, had tornadoes pass close by about 35% more often than those in many areas traditionally considered the heart of Tornado Alley. In fact, large swaths from northern Louisiana to northern Alabama are just as likely to suffer twisters as the Great Plains, the researchers report in an upcoming issue of the Bulletin of the American Meteorological Society. Expanding the tornado risk map to include these areas will increase public awareness and boost efforts to mitigate damages from twisters, the team contends.
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