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17 April 2014 12:48 pm ,
Vol. 344 ,
Officials last week revealed that the U.S. contribution to ITER could cost $3.9 billion by 2034—roughly four times the...
An experimental hepatitis B drug that looked safe in animal trials tragically killed five of 15 patients in 1993. Now,...
Using the two high-quality genomes that exist for Neandertals and Denisovans, researchers find clues to gene activity...
A new report from the Intergovernmental Panel on Climate Change (IPCC) concludes that humanity has done little to slow...
Astronomers have discovered an Earth-sized planet in the habitable zone of a red dwarf—a star cooler than the sun—500...
Three years ago, Jennifer Francis of Rutgers University proposed that a warming Arctic was altering the behavior of the...
- 17 April 2014 12:48 pm , Vol. 344 , #6181
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ScienceShot: Young Galaxies Made Stars From Scratch
13 October 2010 1:09 pm
Modern galaxies like our own Milky Way became giants by swallowing their smaller neighbors and absorbing their billions of stars. But how did the earliest galaxies grow when there weren't nearly as many stars to swallow? A new study, reported online today in Nature, suggests that they swallowed the ingredients for stars instead. A team studying three galaxies that formed over 11 billion years ago observed them all sucking up cold, primordial hydrogen and helium gas from intergalactic space and churning out new stars in their central, star-making regions. Once the gas disappears, the galaxies either acquire new stars via mergers or in the aftermath of supernova explosions, which seed the heavens with heavier elements.
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