6,775 results
6,775 results for: Bears
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Predators shape river world top-down
Hunting and no-hunting zones allow a rare test of the much-debated proposal that big carnivores shape their ecosystems from the top down.
- Agriculture
Calling All Cows
Last May, tissues from the carcass of a North American cow turned up positive for bovine spongiform encephalopathy–the ailment responsible for mad cow disease. Within hours, the Canadian government traced the animal to the Alberta farm where it had been raised for its 8 years of life. In short order, other members of its herd […]
- Humans
Undignified Science
Research advances in 2003 heralded a string of unexpected scientific indignities that will occur in the future, at least in the fevered imagination of one writer.
- Humans
Undignified Science
Research advances in 2003 heralded a string of unexpected scientific indignities that will occur in the future, at least in the fevered imagination of one writer.
- Humans
From the July 8, 1933, issue
THE NYMPHS’ FLOWER Serene, cool, immaculate, the water lily floats beneath the summer sun, where the big flat drops of water shine like silver coins on the round, flat leaves. The water lily has been the delight of poets of all ages and peoples. Of moralists, too, who like to reflect that all that superb […]
- Earth
Eye of the Tiger
Recent research has upended a 130-year-old, previously unchallenged theory about how the semiprecious stone called tiger's-eye is formed.
- Materials Science
Caught on Tape: Gecko-inspired adhesive is superstrong
Researchers have emulated a gecko's sticking power to create a superstrong adhesive.
- Earth
Sticky Situation: Nonstick surfaces can turn toxic at high heat
Nonstick cookware can, if overheated, sicken people and kill birds, according to a new analysis of research published over the past 40 years.
- Health & Medicine
Testing Times
Relying in part on a new rapid HIV test, health officials are working to identify and treat more HIV infections earlier in the course of the disease.
- Earth
On Shifting Ground
In earthquake-prone areas of the United States and elsewhere in the world, debates go on over whether—and how much—to reinforce buildings.
- Anthropology
African Legacy: Fossils plug gap in human origins
Scientists who discovered three partial Homo sapiens skulls in Ethiopia that date to nearly 160,000 years ago say that the finds document humanity's evolution in Africa, independently of European Neandertals.
- Chemistry
Nanoscale Networks: Superlong nanotubes can form a grid
Researchers have made extraordinarily long carbon nanotubes and aligned them to create tiny transistors and sensors for detecting chemical and biological agents.
