Uncategorized
- Math
Manuscripts as Fossils
A new mathematical model estimates how many medieval manuscripts have survived to the present.
- Math
Sea Shell Spirals
The golden ratio doesn't figure into the spiral structure of the chambered nautilus shell.
- Humans
From the March 30, 1935, issue
Dust storms over Washington, D.C., 300 successive generations of fruit flies, and the world's oldest cemetery.
- Humans
Science Cartoons
The science-themed cartoons of Sidney Harris have entertained readers of magazines ranging from American Scientist to The New Yorker for many years. You can find a selection of his delightful cartoons, organized by topic, in this Web gallery. Go to: http://www.sciencecartoonsplus.com/gallery.htm
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19537
I usually tend to downplay worries about research in genetics, but I was quite concerned after reading “Expanding the genetic code” (SN: 4/2/05, p. 222). The researchers surely have plans to keep whatever they create contained. But adding a fifth base to the DNA of bacteria with a genetic mutation rate 10,000 times that of […]
- Ecosystems
Quick Fix: How invasive seaweed repairs its wounds
Scientists have discerned the chemistry underlying the rapid wound-healing process in an invasive green alga that is wreaking havoc in the Mediterranean Sea.
- Astronomy
Star Packed: Super cluster is first to be detected in Milky Way
Astronomers have detected the most massive and densest cluster of young stars ever detected in the Milky Way, a finding that could shed light on how stars formed in the early universe.
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Little Brains That Could: Bees show big-time working memory
Even though a honeybee's brain could fit on the head of a match, the creature's working memory is nearly as effective as that of a pigeon or a monkey.
- Tech
Leak Locator: Ultrasound for finding holes in spacecraft
Researchers have devised a way to pinpoint leaks in spacecraft by listening to ultrasound waves traveling through the ship's hull.
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19536
The technique of ultrasonic leak detection through sensors mounted on the skin of a spacecraft or space station sounds good until the structures being monitored become more complex than a single sheet of aluminum. Then, resolving ambiguities from reflections and localizing the exact point of leakage may become difficult. Perhaps a portable device, with four […]
- Earth
Breeding Parasites Along with Fish: Do sea lice from salmon farms spread far?
Marine parasites known as sea lice spread readily from farmed salmon to passing wild fish, according to a controversial study conducted in British Columbia.
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Follicle Size Matters: Hormone regimen may reduce pregnancy success
Hormone injections used to induce livestock and women to ovulate could force eggs to leave ovarian follicles before they are fully mature and thereby jeopardize pregnancy outcomes.
