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5 December 2013 11:26 am ,
Vol. 342 ,
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...
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...
- 5 December 2013 11:26 am , Vol. 342 , #6163
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ScienceShot: Hubble Spies Oldest Galaxies Yet
8 January 2013 3:30 pm
LONG BEACH, CALIFORNIA—Buried in this image of a minute patch of the night sky are remote galaxies so faint (marked by diamonds, above) that it took the Hubble Space Telescope more than 100 hours to register their feeble light. Obtained last fall, the Ultra Deep Field 2012 provides astronomers with the deepest view yet of the very early universe. An analysis of the observed properties of the most distant objects, presented here on Monday at the 221st meeting of the American Astronomical Society, indicates that there must be a huge, unobserved population of even fainter galaxies. The energy of newborn stars in these primordial galaxies was responsible for heating up the cold hydrogen gas in intergalactic space, just a few hundred million years after the big bang. Astronomers expect that the future James Webb Space Telescope, due to be launched in 2018, will succeed in actually imaging these faint objects, so stay tuned for an even deeper field.
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