6,875 results
6,875 results for: Bears
- Chemistry
The skinny on indoor ozone
Indoor concentrations of ozone tend to be far lower than those outside, largely because much gets destroyed as molecules of the respiratory irritant collide with surfaces and undergo transformative chemical reactions. New research identifies a hitherto ignored surface that apparently plays a major role in quashing indoor ozone: It’s human skin. And while removing ozone from indoor air should be good, what takes its place may not be, data indicate.
- Climate
Polar Bear Fallout
Why fights are likely to break out in the next few months to years between industry, environmental advocates, and the feds as regulations are developed, and litigated, over how to conserve declining numbers of polar bears.
- Humans
Bear deadline
Court calls for the already overdue decision on listing polar bears as a threatened species.
- Humans
Newborn babies may cry in their mother tongues
Days after birth, French and German infants wail to the melodic structure of their languages.
- Paleontology
Small ancestor of giant sauropods unearthed
Fossils suggest that the bipedal dinosaur occasionally walked on all fours and could open its mouth wide to gather foliage.
- Agriculture
Frogs: Clues to how weed killer may feminize males
Atrazine, a widely used agricultural herbicide, not only can alter hormone levels in the developing frogs, but also perturb their physical development — and lead to an excess number of females, researchers report. Their new findings may help explain observations reported by a number of other research groups that at least in frogs, fairly low concentrations of atrazine can induce a feminization — or demasculinization.
- Earth
Frogs: Weed killer creates real Mr. Moms
Several months back, a Berkeley undergraduate began witnessing distinctly odd behavior in frogs she was caring for in the lab. At about 18-months old, some frisky guys began regularly mounting tank mates, as if to copulate. Except that their chosen partner was invariably male. He had to be. Because genetically, every animal in the tank was male.
- Animals
Polar bears listed
Polar bear declared "threatened," but Secretary limits decision's impact.
- Physics
Pseudo pores help fling spores
New studies reveal that a thick, soft plant expels its progeny in an unexpected way.
- Anthropology
Stone Age campers set up separate activity areas
Hominids displayed advanced organizational thinking almost 800,000 years ago
- Life
Dino-era delivery at sea
Genetic determination of gender is linked to live birth and evolutionary success of ancient marine reptiles, study finds.
- Earth
Arctic images declassified
High-res Arctic sea images should be declassified, says National Research Council.
