5,012 results
- 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 […]
- Computing
Pictures Only a Computer Could Love
New, unconventional lenses shape scenes into pictures for computers, not people, so that computer-equipped microscopes, cameras, and other optical devices can see more with less.
- Astronomy
Visible Matter: Once lost but now found
New observations confirm that most of the visible matter in the universe lies hidden in vast, hard-to-detect gas clouds between galaxies.
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Raising Trust
Some forager groups may nurture a sharing sense in their offspring.
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Essence of g
New efforts to probe the biology of intelligence stir up a long-running controversy over what mental tests actually measure.
- Computing
Finding networks within networks
A new mathematical procedure, or algorithm, picks out those members within a larger network—for instance, related sites on the World Wide Web—that have especially close ties.
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The Eyes Have It: Newborns prefer faces with a direct gaze
Only a few days after birth, babies already home in on faces that fix them with a direct gaze and devote less attention to faces with eyes that look to one side.
- Health & Medicine
Transplant Triumph: Cloned cow kidneys thrive for months
Cow kidneys and other tissue made by cloning ward off immune rejection after transplantation into cows.
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Dolphins may seek selves in mirror images
Dolphins apparently recognize their own reflections.
- Health & Medicine
Acrylamide—From Spuds to Gingerbread
Just in time for the holiday season, the Bavarian Ministry of Health reports finding extremely high concentrations of acrylamide—a chemical that causes cancer in rats—in gingerbread. German chemists turned up acrylamide in a favorite holiday treat: gingerbread. Whether baked at home or fried at a restaurant, all hot-potato products cooked up substantial quantitites of acrylamide. […]
- Animals
Gator Feelings: Tough faces, more sensitive than ours
Alligator and crocodile faces carry pressure receptors so responsive that they can detect ripples on the water's surface from a single falling drop.
- Health & Medicine
Stem Cell Success: Mice fuel debate on embryo cloning
In mouse studies, scientists have used a technique called therapeutic cloning to create personalized replacement tissue.
