News
- 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.
- Animals
Ear for Killers: Seals discern foes’ from neighbor-whales’ calls
Harbor seals eavesdrop on killer whales and can tell the harmless neighborhood fish eaters from roving gangs with a taste for fresh seal.
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Thoughtful Lessons: Training may enhance intellect in elderly
The largest study of its kind finds that a brief training course in memory, reasoning, or visual concentration boosts performance on laboratory tests of these cognitive skills among physically healthy elderly people.
- Earth
Shaked Alaska: A sleepy fault wakes and reveals new links
One of the most powerful earthquakes ever recorded on U.S. land shook south-central Alaska on Nov. 3, revealing activity along the Denali fault.
- Physics
Speedy impacts send microwave distress calls
Laboratory smash-ups mimicking those between fast-moving space debris and satellites appear to emit microwave bursts, suggesting that microwave detectors might someday prove useful for monitoring the health of spacecraft.
- Animals
Tadpoles kill by supersuction
A high-speed video shows tiny African tadpoles that catch their prey in a manner unlike that used by any other frog larvae: by shooting out a tubular mouth for superfast suction.
- Health & Medicine
Immune protein may stall HIV
People who have HIV but don't progress to AIDS make extra perforin, a protein that helps kill infected cells.
- Planetary Science
Europa’s freckles
Reddish spots and shallow pits that pepper the surface of Jupiter's moon Europa may mark regions where warmer and less dense ice percolates to the surface.
