6,775 results
6,775 results for: Bears
- 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.
- 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.
- 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.
- 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
- Animals
Polar bears listed
Polar bear declared "threatened," but Secretary limits decision's impact.
- 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.
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Unsticking Spirit
Efforts to extract the Mars rover from a sandpit will start November 16, but success is uncertain.
- Humans
Science & Society: News of the year, 2008
Science News writers and editors looked back at the past year's stories and selected a handful as the year's most interesting and important in the interface of Science & Society. Follow hotlinks to the full, original stories.
