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Y Chromosome, Though Diminished, Is Holding Its Ground
The Y chromosome is just a fraction of its original size, and much smaller than its buxom partner, the X chromosome, but researchers say its gene-shedding days seem to be over.
Volunteers Offer Salamanders a Chance to Mate
Tom Mann, a zoologist with the Mississippi Department of Wildlife, Fisheries and Parks, holds a spotted salamander that he was helping to cross a road.
Transcripts Show U.S. Confusion Early in Japan Nuclear Crisis
The United States Nuclear Regulatory Commission struggled to get accurate reports on the nuclear meltdown at the Fukushima Daiichi plant last year, transcripts show.

Editor's Choice

Atty. Gen. Kamala Harris, tech giants agree on mobile app privacy
California Atty. Gen. Kamala Harris announced Wednesday an agreement between her office and six tech giants -- Apple, Amazon, Google, Hewlett-Packard, Microsoft and Research In Motion -- to mandate that apps sold in their digital app stores and running on their mobile operating systems have clear privacy policies.
Study: Facebook profile beats IQ test in predicting job performance
Can a person's Facebook profile reveal what kind of employee he or she might be?
Google to pass Facebook in U.S. display ad revenue, report says
Watch out, Facebook, Google is gaining.

Hot Debates

Birds sing louder amidst the noise and structures of the urban jungle
Sparrows, blackbirds and the great tit are all birds known to sing at a higher pitch in urban environments. It was previously believed that these birds sang at higher frequencies in order to escape the lower frequencies noises of the urban environment. Now, researchers have discovered that besides noise, the physical structure of cities also plays a role in altering the birds' songs.
World of Warcraft boosts cognitive functioning in older adults
For some older adults, the online video game World of Warcraft (WoW) may provide more than an opportunity for escapist adventure. Researchers have found that playing WoW boosted cognitive functioning for older adults – particularly those who had scored poorly on cognitive ability tests before playing the game.
An OFF switch for pain? Chemists build light-controlled neural inhibitor
Pain? Just turn it off! It may sound like science fiction, but researchers have now succeeded in inhibiting pain-sensitive neurons on demand, in the laboratory. The crucial element in their strategy is a chemical sensor that acts as a light-sensitive switch.

Most Emailed

The rhythm of biology
An art exhibit in New York City explores the science behind our reaction to sounds
XMRV doesn't cause chronic fatigue
Two studies point to contamination of patient samples as the cause of a controversial 2009 finding that linked the mouse virus XMRV with chronic fatigue syndrome
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