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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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Clouds Circle Black Holes
20 February 2014 4:45 pm
Once thought to be fog, astronomers are discovering that clouds circle supermassive black holes. After sifting through the last 16 years of records collected by a NASA satellite that measured x-rays emitted from black holes, researchers noticed multiple instances when x-ray signals the satellite logged dimmed for periods of time, they report in the Monthly Notices of the Royal Astronomical Society. The dimming is believed to be caused by a cloud passing and interrupting the signal between the black hole and the satellite.
See more Signal/Noise.