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5 December 2013 11:26 am ,
Vol. 342 ,
An animal rights group known as the Nonhuman Rights Project filed lawsuits in three New York courts this week in an...
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,...
- 5 December 2013 11:26 am , Vol. 342 , #6163
- About Us
Basking in the Heat of the Universe
9 January 1998 8:00 pm
WASHINGTON, D.C.--Scientists have found new evidence for a cosmic infrared background radiation, a sort of fossil radiation thought to have been emitted during the earliest surge of star and galaxy formation. This warm glow puts a limit on the total amount of energy released by all the stars in the universe, which will help improve development of models explaining the birth and evolution of stars and galaxies after the big bang.
Unlike the cosmic microwave background, the infrared (IR) radiation was given off after formation of stars and galaxies had begun, perhaps from galaxies shrouded in dust. The new results were obtained by two groups of astronomers who drew data from an experiment aboard NASA's Cosmic Background Explorer satellite. One team, led by Michael Hauser of the Space Telescope Science Institute in Baltimore, announced its findings here today at a meeting of the American Astronomical Society.
A second group also detected the IR signature in the satellite data. When researchers meticulously subtracted emissions from bright, patchy sources in the Milky Way, background radiation emerged. It "just popped out of the analysis," says Marc Davis of the University of California, Berkeley, who, with David Schlegel of the University of Durham in the U.K. and Berkeley's Doug Finkbeiner, has submitted their calculations to The Astrophysical Journal.