Uncategorized
- Humans
From the February 4, 1933, issue
SUPERLATIVE SPLENDOR REVEALED BY EXCAVATIONS IN PERSIA Eastern magnificence that surrounded Persian emperors 2,500 years ago is revealed by excavations at Persepolis. Palaces of the kings are being brought to light there by Dr. Ernest Herzfeld excavating for the Oriental Institute of the University of Chicago. The sculptured walls arouse comparisons with glories of one […]
- Physics
Powers of Ten
Florida State University’s “Molecular Expressions” Web site offers a fascinating sequence of images, each one 10 times bigger or smaller in scale than the one preceding or following it. The journey ranges from a view of the universe 10 million light years away from the Milky Way to an impressionistic glimpse of a diminutive sea […]
- Physics
Quantum computers to keep an eye on
A primitive ion-based computer exploiting the weirdness of quantum mechanics has taken an important step forward in problem solving.
- Humans
Talent Found: Top science students chosen in 62nd annual competition
Forty wunderkinder, named as finalists in the annual Intel Science Talent Search, will collect $530,000 in scholarships for original research in science, mathematics, and engineering.
- Earth
Putting Whales to Work: Cetaceans provide cheap labor in the icy deep
Whales equipped with environmental sensors discover warm water beneath Arctic ice.
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Heat-Seeking Missiles: Sperm may follow rising temperature to egg
In a process called thermotaxis, sperm cells may use a temperature gradient in the fallopian tubes to find their way to an unfertilized egg.
- Health & Medicine
Rackets and Radicals: Noise may cause gene damage in heart
Exposure to loud, continuous sound can scatter free radicals within heart tissue and cause injury to cells' DNA even after the din subsides, new animal research suggests.
- Chemistry
Shark Sense: Gel helps animals detect thermal fluctuations
New studies suggest that clear jelly under sharks' skin can enable the animals to detect minute changes in seawater temperature—potentially leading them to prey.
- Math
Sliding-Coin Puzzles
Geometric arrangements of coins can serve as the basis for all sorts of puzzles. One popular variant involves going from one configuration to another by sliding coins, subject to given constraints, and doing so in the fewest possible moves. Rearrange the rhombus into a circle using three moves. Turn the triangle upside-down in three moves. […]
- Animals
Better Than Real: Males prefer flower’s scent to female wasp’s
In an extreme case of sex fakery, an orchid produces oddball chemicals to mimic a female wasp's allure so well that males prefer the flower scent to the real thing.
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19209
Your article says that “lactose, a sugar in milk, commonly elicits allergic reactions.” Lactose and many other carbohydrates don’t elicit an allergic response. Jonathan StapleyWest Lafayette, Ind. Lactose intolerance is the inability to digest significant amounts of lactose because there’s a shortage of an enzyme that breaks down milk sugar. This condition shouldn’t have been […]
- Anthropology
Dairying Pioneers: Milk ran deep in prehistoric England
Chemical analyses of prehistoric pot fragments indicate that English farmers milked livestock beginning around 6,000 years ago, providing the earliest confirmed evidence of dairying anywhere in the world.
