News
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Dolphins bray when chasing down a fish
The first high-resolution analysis of which dolphin is making which sound suggests that hunters blurt out a low-frequency, donkeylike sound that may startle prey into freezing for an instant or attract other dolphins.
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Invader ants win by losing diversity
The Argentine ants that are trouncing U.S. species derive much of their takeover power, oddly enough, from losing genetic diversity.
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Attachment disorder draws closer look
A substantial minority of children exposed to severe deprivation in institutions as infants can't form close relationships, a condition for which there is no established treatment.
- Earth
Warm band may have girdled snowball Earth
A swath a liquid ocean may have hugged the planet's midriff even during the most frigid global climatic episodes between 800 million and 600 million years ago, allowing life to survive.
- Health & Medicine
New inner ear hair cells grow in rat tissue
Using a gene known to control hair-cell growth, researchers have grown hair cells in tissue taken from newborn rats' cochleas, raising hopes that inner ear damage may someday be reversible.
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Popularity of germ fighter raises concern
The growing use of the antiseptic triclosan in products ranging from mouthwash to cutting boards and hunting clothes may create bacteria resistant to antibiotic drugs.
- Animals
The whole beehive gets a fever…
When bee larvae are fighting off disease, the nest temperature rises, so the whole hive gets a fever.
- Health & Medicine
Salt trial provokes DASH of skepticism
Though a new study finds that dramatic salt restriction can lower blood pressure, even among people without hypertension, some critics challenge its value in setting new dietary guidelines for all adults.
- Astronomy
Newfound Galaxy Goes the Distance
Astronomers have discovered a galaxy so remote that the light reaching Earth left the body some 13.6 billion years ago, making it the most distant object ever detected.
- Tech
Hidden Costs: It takes much stuff to make one tiny chip
A new analysis reveals that the production of a single 2-gram microchip requires nearly 2 kilograms of chemicals and fossil fuels.
- Health & Medicine
Attack of the Clones: Immune cells single out melanoma tumors
Scientists can extract immune system cells that recognize tumor cells from people with melanoma, culture the rare cells to greatly increase their number, and inject them into the patients, sometimes putting the brakes on cancer.
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The Brain’s Funny Bone: Seinfeld, The Simpsons spark same nerve circuits
Brain scans of people watching sitcoms show that different brain regions spark with activity when a person initially gets a joke versus when he or she subsequently responds to its humor.
