All Stories
- 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.
- Health & Medicine
Dietary Inflation
“Finish what’s on your plate!” Thus has a multitude of well-intentioned moms exhorted millions of children, in an attempt to ensure good nutrition. Unfortunately, dieticians now find, too many grownups still feel compelled to empty their plates–even when those plates contain substantially more calories than our bodies need. Add to that the fact that modern […]
- Humans
From the July 5, 1930, issue
POWER PLANT SENTINELS When hundreds of thousands of horsepower traveling with the speed of lightning are instantly halted, you may be sure there will be a grand disturbance. And there is, but all the fuss is confined in steel tanks 25 feet tall and 10 feet wide, filled with oil. Two such tanks are shown […]
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Classic Body
As part of an effort to put great works of fiction and nonfiction on the Web, Bartleby.com now presents the classic medical textbook Henry Gray’s Anatomy of the Human Body in all its searchable glory. The electronic version of the 1918 edition features 1,247vibrant engravings, many in color, as well as a subject index with […]
