6,775 results
6,775 results for: Bears
-
-
In Pursuit of the Briefest Beat
Attosecond pulses of light could open electrons’ fast-paced world.
- Humans
Beefy hormones: New routes of exposure
On any given day, some 750,000 U.S feedlots are beefing up between 11 million and 14 million head of cattle. The vast majority of these animals will receive muscle-building steroids — hormones they will eventually excrete into the environment. But traditional notions about where those biologically active pollutants end up may need substantial revising, several new studies find.
- Chemistry
Deadly mushroom toxin exposed
Researchers have isolated and identified a muscle-destroying compound in some mushrooms.
-
- Archaeology
Stone Age flutes found in Germany
Excavations in Germany have unearthed what may be the oldest known musical instruments.
-
Dressing up dinos
Adding soft tissue to bone helps scientists, paleoartists bring ancient creatures to life.
- Life
Mimivirus up close
Scientists get a closer look at the structure of mimivirus, the largest virus in the world.
- Health & Medicine
Herbal supplementation can be an empty gesture
Chemical analyses show some botanical extracts contain little of the plant material they were supposed to possess.
- Archaeology
Engraved pigments point to ancient symbolic tradition
Analyses of patterns incised on pieces of ancient pigment indicate that people in southern Africa passed along symbolic practices from 100,000 to 75,000 years ago, scientists say.
-
Humans wonder, anybody home?
Brain structure and circuitry offer clues to consciousness in nonmammals.
- Health & Medicine
Postmenopausal hormones up cancer risk
Danish researchers weigh in fairly conclusively on the risk of one especially deadly cancer.
