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5 December 2013 11:26 am ,
Vol. 342 ,
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,...
Since arriving on the island of Guam in the 1940s, the brown tree snake ( Boiga irregularis ) has extirpated native...
- 5 December 2013 11:26 am , Vol. 342 , #6163
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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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