Uncategorized
- Materials Science
Nanotube ID: New signatures aid nanotech progress
Researchers have developed a means for rapidly distinguishing among 33 semiconducting varieties of carbon nanotubes.
- Health & Medicine
Cluster Bombs: Metabolic syndrome tied to heart disease deaths
Men with a certain cluster of metabolic characteristics are about three times as likely to die of heart disease as men without the traits are.
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19212
It’s no surprise to find that the Borneo tree frog tunes into his tree hole. From the resonance of electron shells to the orbits of planets, stars, and galaxies, harmonic relationships define all of creation. Many frogs have external tympanic membranes that resonate to their tiny chirpings. This mechanism helps put entire ponds full of […]
- Animals
Frogs Play Tree: Male tunes his call to specific tree hole
Borneo's tree-hole frog may come as close to playing a musical instrument as any wild animal does. [With audio file.]
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19211
This article recommended shock absorbers and cushioned seats. Did this study survey what type of bikes the volunteers rode? Doug LandonSimi Valley, Calif. Study coauthor Ferdinand Frauscher notes that although most of the long-time bikers now use bikes with shock absorbers and padded seats, they almost all originally rode bikes with little or no padding […]
- Health & Medicine
Jarring Result: Extreme biking can hurt men’s fertility
Men who maintain grueling mountain-bicycling programs are apt to have lower sperm counts than nonbikers are.
- Anthropology
Script Delivery: New World writing takes disputed turn
Researchers announced, to considerable controversy, that inscriptions found on artifacts at an Olmec site in southeastern Mexico represented the earliest known writing system in the Americas.
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19210
Contrary to your article, animal cells do not possess “cell walls,” as suggested by “proteases are usually much smaller and don’t inhabit cell walls.” Plants have cell walls; animal cells are bound by a single lipid bilayer membrane. David Winialski Tallahassee, Fla.
- Health & Medicine
Keeping the beat
Muscle cells taken from embryonic rats and put into an adult rat's heart can transmit the electric signals that govern the heartbeat.
- Tech
Robotic heart surgery
By using robotic rather than conventional open-heart techniques, doctors can perform heart surgery with smaller incisions, giving patients less pain and speeding recovery.
- Math
Five-Suit Decks, Traffic-Jam Puzzles, and Other Treats
Tired of playing the same old card games with the same old cards? One option is to expand the deck to include five suits instead of just four. To solve this difficult Rush Hour puzzle, you must move vehicles out of the way to permit the red car to exit at right. The best known […]
- Health & Medicine
Cycling and surgery have similar effect
Among people with chest pain because of clogged heart arteries, regular exercise on a stationary bike reduced symptoms better than surgery did.
