Uncategorized
- Paleontology
Dinosaurs!
The Smithsonian Institution’s dinosaur Web site tells the story of the National Museum of Natural History’s collections, research, and staff. Visitors not only learn about the early history of these well-known dinosaur collections but also get a chance to participate in a virtual dinosaur discovery, click through an interactive “Tree of Life” highlighting milestones in […]
- Animals
Perfect Match: Tied contest gives fish no hormone rush
A male fish produces a burst of hormones as he fights off an intruder, but this surge isn't triggered simply by fighting.
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In this article the mirror image isn’t really a perfect match, is it? It doesn’t itself secrete anything. Also, could the mirror be made to slowly withdraw, thus pulling the fish image away from the real fish in a simulated retreat? Let’s see then if there are any victory-induced hormones released. W. Gregory StewartLos Angeles, […]
- Tech
Electronics Gets Y’s: Nanotubes branch out as novel transistors
Y-shaped nanotubes might become a common component in ultrasmall electronic circuitry.
- Materials Science
Sun and Sand: Dirty silicon could supply solar power
Scientists have proposed a way to control the distribution of contaminants in silicon, potentially opening up the use of cheaper starting materials for making solar cells.
- Planetary Science
Top of the Martian hill
After a 14-month climb up a Martian hill, NASA's rover Spirit took a panoramic image of the view from the top.
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Thinking the Hurt Away: Expectations hitch ride on pain’s brain pathway
Positive thinking exerts a calming effect on pain-related brain areas, yielding a substantial reduction in the actual perception of pain, a brain-scan investigation suggests.
- Humans
Hurricane provisions
We at Science News express our strong concern and extend our deepest sympathy to those who are suffering through the ongoing ordeal caused by Hurricane Katrina.
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Dead Tired: Weary doctors function as if intoxicated
After a month of long hours of challenging work, fatigued physicians show impairments in driving and other tasks requiring constant attention and quick reactions.
- Health & Medicine
Critical for Coating: Protein directs nerve-sheath construction
A protein produced by nerve cells is essential for the manufacture of myelin, the fatty sheath surrounding nerve fibers.
- Humans
Letters from the September 10, 2005, issue of Science News
Pennies in heaven? Why slam a copper impactor into Comet Tempel 1 (“A Grand Slam: In a winning move, NASA probe burrows into a comet,” SN: 7/9/05, p. 22)? Wouldn’t copper vapor contaminate the spray? Why not a high-temperature ceramic? P.M. deLaubenfelsCorvallis, Ore. According to Casey Lisse of the Deep Impact team, copper was chosen […]
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