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6 March 2014 1:04 pm ,
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Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
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When Opposites Attract the Nobel Prize
3 February 1999 7:00 pm
This week would have marked the 94th birthday of physicist Emilio Segrè, discoverer of the antiproton. The Italian-born American physicist, who died in 1989, studied proton-proton and proton-neutron interactions at the cyclotron accelerator in Berkeley, California. In the early 1950s, Segrè used the Bevatron to accelerate protons to 6 billion electron volts and smash them into a metal plate. The collisions yielded a negatively charged beam composed mainly of pions, muons, and electrons. Segrè also detected in the beam the faint presence of antiprotons--a discovery that earned him and colleague Owen Chamberlain the 1959 Nobel Prize in physics. The existence of antiprotons had been predicted 20 years earlier by physicist Paul Dirac.
[Source: Roy Porter, Ed., The Biographical Dictionary of Scientists (Oxford University Press, ed. 2, 1994).]