Science News Magazine:Vol. 170 No. #22
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More Stories from the November 25, 2006 issue
Tough policing deters cheating in insects
In insect societies that have tough police, it's coercion, rather than kinship, that's preventing crime.By Susan Milius
Jet lag might hasten death in elderly
Mimicking jet lag in old mice brought on an early death in the animals.
Health & Medicine
Bug be gone
An experimental device that combines a special comb with a forceful air blower kills head lice and their nits.By Nathan Seppa
Physicists have discovered never-before-seen subatomic particles related to protons and neutrons but laden with exotic, heavy subparticles called bottom quarks.
Low body heat lengthens mouse lives
Mice genetically engineered to have slightly lower-than-normal body temperatures lived significantly longer than mice with normal body temperatures.
Ancients made nanotech hair dye
A hair-darkening paste invented thousands of years ago forms lead-and-sulfur nanocrystals remarkably similar to those made in today's nanotechnology labs.
Toxin Buster: New technique makes cottonseeds edible
Scientists have engineered cotton plants that produce seeds missing a toxic compound that had previously made them inedible.
Fighting Styles: Gene gives flies his, her conflict moves
Switching forms of one gene can make a male fruit fly fight like a girl, and vice versa.By Susan Milius
Cosmic Pops: Nearby galaxy is hotbed of supernova formation
Large galaxies usually have no more than three supernovas blow up in a century, but the nearby galaxy NGC 1316 has had two such explosions within the past 5 months and four in the past 26 years.By Ron Cowen
Health & Medicine
Kidney Progress: Drug slows cyst growth
The trial drug roscovitine has been shown to reverse polycystic kidney disease in mice.By Nathan Seppa
Super Silicon: Top semiconductor turns into a superconductor
A heavy dose of boron transforms silicon, the superhero material of electronics, into a superconductor.
Age Becomes Her: Male chimpanzees favor old females as mates
Male chimpanzees in Uganda prefer to mate with older females, a possible sign of males' need to identify successful mothers in a promiscuous mating system.By Bruce Bower
Health & Medicine
Ticking toward Trouble: Long-term rise in heart rate portends death
Men whose hearts beat faster over time are likely to die earlier than those whose hearts keep an unchanging cadence year after year, according to a 20-year study.By Ben Harder
Balancing Act: El Niños and dust both affect coral bleaching
Most of the annual variation in the extent of coral bleaching in the Caribbean is driven by two factors: the amount of dust and other particles suspended in the atmosphere, and the climate phenomenon known as El Niño.By Sid Perkins
Chemical Pop-Up Books
Chemists and engineers have designed two-dimensional structures that self-fold into functional, three-dimensional objects, such as miniature chemistry laboratories and drug-delivery devices.
The Mind of the Swarm
Mathematics is helping explain how animals form flocks, swarms, and schools.
Letters from the November 25, 2006, issue of Science News
Wasted youth The experiments with mice infected with the 1918 influenza virus are important but not surprising (“The Bad Fight: Immune systems harmed 1918 flu patients,” SN: 9/30/06, p. 211). John Barry’s The Great Influenza: The Epic Story of the Deadliest Plague in History (2004, Viking) explains that many, perhaps most, of the victims were […]By Science News