6,898 results
6,898 results for: Bears
- Animals
Megafish Sleuth: No Steve Irwin
There's no reason a scientist can't be an action hero — even if his damsels in distress have fins.
- Health & Medicine
Postmenopausal hormones up cancer risk
Danish researchers weigh in fairly conclusively on the risk of one especially deadly cancer.
- 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.
- Earth
Protected whales found in Japan’s supermarkets
Toothless Asian whales find themselves being protected by fairly toothless regulations.
- 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.
- Climate
U.N effectively locks out reporters, others in Copenhagen
For a year, the United Nations and national leaders have stumped around the world, championing the importance of the Copenhagen climate negotiations. It made this international conclave a must-see destination. And the UN responded by granting accreditation to huge numbers of government officials, UN officials, public-interest groups and journalists. In fact, to almost twice as many individuals as the conference center could hold. And that led to pandemonium today as the UN confronted literally thousands of people waiting to pick up their security badges – people this organization couldn’t or wouldn’t accommodate.
- Climate
Obama: Climate’s rock star
A little over a half-hour ago, President Barack Obama wrapped up a stirring pep talk to his fellow world leaders attending the United Nations climate change meeting. He didn’t promise the world. Only that the United States could be depended upon to do its part in helping stem global greenhouse gas emissions and to fund measures that would help fund the world’s poorest and climate-beleaguered nations adapt. But what was especially interesting was to watch how the whole climate conference has waited with baited breath to learn what Obama would say: Could our President make promises that would at last galvanize action in the United States and accord among countries whose views, even yesterday, seemed poles apart?
- Earth
The FY 2011 budget: So much for transparency
Cabinet officials and other administration leaders met with reporters yesterday to outline the President’s Fiscal Year 2011 federal budget. That spending blueprint includes $147-billion-and-change for research and development programs. But in contrast to past years, details tended to be skimpy today — and any chance for followup or verification of apparent trends has proven more difficult than usual.
- Quantum Physics
Higgs and his particle prove elusive
Peter Higgs and colleagues receive particle theory prize; scientists still hunting the proposed boson
- 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.
- 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.
- 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.
