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6 March 2014 1:04 pm ,
Vol. 343 ,
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...
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...
- 6 March 2014 1:04 pm , Vol. 343 , #6175
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Twinkle, Twinkle Little Star
9 February 1999 8:00 pm
marks the 31st anniversary of the announcement by British astronomer Antony Hewish of the discovery of pulsars--stars that emit regular bursts of radio waves. At the time, some British tabloids reported that scientists had contacted alien civilizations. Using a radio telescope designed by Hewish to detect radio signals that "twinkle," his colleague, Irish astronomer Jocelyn Susan Bell Burnell, noticed in August 1967 a source that gave off short, regular, rapid bursts of energy--a signal coming from something very small and very far away. Bell Burnell later found other similar signals in the telescope charts. Hewish received the 1974 Nobel Prize in physics for his pioneering contributions to radio astronomy, including his role in the discovery of pulsating stars, which turned out to be neutron stars--the compact, spinning inner cores of stars that had died and exploded as supernovae.
[Source: Emily McMurray, Ed., Notable Twentieth Century Scientists (Gale Research Inc., ITP, 1995)]