Science

When roasted at 475 degrees, coffee beans are sometimes described as rich and full-bodied. But for the full-bodied person who is not so rich, unroasted coffee beans - green as the day they were picked - may hold the key to cheap and effective weight loss, new research suggests. In a study presented Tuesday at the American Chemical Society's spring national meeting in San Diego, 16 overweight young adults took, by turns, a low dose of green coffee bean extract, a high dose of the supplement, and a placebo.

Scientists dissecting the remains of the disastrous 1980 explosion of Mt. St. Helens in Washington state say that crystal formations trapped in volcanic rocks hold important clues about when a magma-loaded mountain is about to blow - a discovery that could help volcanologists make more accurate predictions about future eruptions. The findings, published in Friday's edition of the journal Science, link the movement of underground magma to earthquakes, gas emissions and other warning signs that are more accessible to experts who monitor active volcanoes above ground.

In an age of long commutes, late sports practices, endless workdays and 24/7 television programming, the image of Mom hanging up her dish towel at 7 p.m. and declaring "the kitchen is closed" seems a quaint relic of an earlier era. It also harks back to a thinner America. And that may be no coincidence. A new study, conducted on mice, hints at an unexpected contributor to the nation's epidemic of obesity - and, if later human studies bear it out, a possible way to have our cake and eat it too, with less risk of weight gain and the diseases that come with it. Just eat your cake - or better yet, an apple - earlier.

The PSA test should be abandoned as a prostate cancer screening tool, a government advisory panel has concluded after determining that the side effects from needless biopsies and treatments hurt many more men than are potentially helped by early detection of cancers. At best, one life will be saved for every 1,000 men screened over a 10-year period, according to the U.S. Preventive Services Task Force. But 100 to 120 men will have suspicious results when there is no cancer, triggering biopsies that can carry complications such as pain, fever, bleeding, infection and hospitalization.

Researchers have some reassuring news for the legions of coffee drinkers who can't get through the day without a latte, cappuccino, iced mocha, double-shot of espresso or a plain old cuppa joe: That coffee habit may help you live longer. A new study that tracked the health and coffee consumption of more than 400,000 older adults for nearly 14 years found that java drinkers were less likely to die during the study than their counterparts who eschewed the brew. In fact, men and women who averaged four or five cups of coffee per day had the lowest risk of death, according to a report in Thursday's edition of the New England Journal of Medicine.

The PSA test should be abandoned as a prostate cancer screening tool, a government advisory panel has concluded after determining that the side effects from needless biopsies and treatments hurt many more men than are potentially helped by early detection of cancers. At best, one life will be saved for every 1,000 men screened over a 10-year period, according to the U.S. Preventive Services Task Force. But 100 to 120 men will have suspicious results when there is no cancer, triggering biopsies that can carry complications such as pain, fever, bleeding, infection and hospitalization.

Manny Hamelburg, 68, a retired businessman, had fought prostate cancer for years. First, he tried radiation, then a drug with side effects that nearly killed him, and finally Lupron, a drug that blocks production of testosterone, the hormone that can fuel prostate cancer. The cancer disappeared. But life was miserable. Without normal levels of testosterone, Hamelburg says, he had no energy, and "zero libido for seven years. I was like a eunuch. I was chemically castrated. Sex was just hugs."

A new study showing an estimated 7% of American teens and adults carry the human papillomavirus in their mouths may help health experts finally understand why rates of mouth and throat cancer have been climbing for nearly 25 years. The evidence makes it clear that oral sex practices play a key role in transmission. The new data, published online Thursday by the Journal of the American Medical Assn., are the first to assess the prevalence of oral HPV infection in the U.S. population.

In the remote northeastern corner of Guatemala, archaeologists have found what appears to be the 9th century workplace of a city scribe, an unusual dwelling adorned with magnificent pictures of the king and other royals and the oldest known Maya calendar. This year has been particularly controversial among some cultists because of the belief that the Maya calendar predicts a major cataclysm - perhaps the end of the world - on Dec. 21, 2012. Archaeologists know that is not true, but the new find, written on the plaster equivalent of a modern scientist's whiteboard, strongly reinforces the idea that the Maya calendar projects thousands of years into the future.

The biggest home in Los Angeles County is ready for a new nickname: The 56,500-square-foot Manor, dubbed Candyland after owner Candy Spelling, has been sold to another wealthy socialite, British heiress Petra Ecclestone, in an all-cash deal for $85 million. As steep as that price is, it's not a record or even close to what Spelling was asking. The priciest Southland home transaction was the 2000 sale of an 8-acre estate in Bel-Air to financial executive Gary Winnick in a deal that included the trade of other land, for a total value of about $94 million.

A rare "ring" solar eclipse is coming to California on Sunday evening - the first of its kind to be visible from the continental United States since 1994. From our vantage point in Southern California, the moon will block about 85% of the sun's diameter, leaving behind a crescent-shaped sliver. But those farther north will see the moon nudge its way into the center of the sun, leaving a ring of fire visible around the moon's edge. Scientists call this an annular eclipse. ("Annulus" means "ring" in Latin.)

Had enough of life in the fast lane and looking to take it down a notch or two? You might seek guidance from a colony of deep-sea microbes harvested from the barren depths of the Pacific Ocean that are progressing so slowly, they almost appear to be dead. Just how plodding are these ancient creatures, who are buried about 100 feet deep in the seabed? Some of them haven't received any new food for 86 million years, when dinosaurs still walked the Earth. And they are using up oxygen at rates 10,000 times slower than their counterparts on the surface of the ocean floor.

What could possibly cause rocks picked up at a popular state beach to ignite in the pocket of a woman's cargo shorts? To scientists, the answer is - well, there is no clear answer. The case of an Orange County woman severely burned after rocks collected last weekend from San Onofre State Beach ignited in her pocket has puzzled scientists, who say they've never seen anything like it and aren't quite sure how it happened. "It's pretty implausible," said Larry Overman, a professor of chemistry at UC Irvine.

In an age of long commutes, late sports practices, endless workdays and 24/7 television programming, the image of Mom hanging up her dish towel at 7 p.m. and declaring "the kitchen is closed" seems a quaint relic of an earlier era. It also harks back to a thinner America. And that may be no coincidence. A new study, conducted on mice, hints at an unexpected contributor to the nation's epidemic of obesity - and, if later human studies bear it out, a possible way to have our cake and eat it too, with less risk of weight gain and the diseases that come with it. Just eat your cake - or better yet, an apple - earlier.

University of California regents Wednesday discussed the possibility of a 6% tuition increase for next fall but pledged that they would lobby hard to avoid such a $732-per-student hike. With such money worries rippling through the 10-campus system, the regents approved the hiring of a new chancellor for UC San Diego at a $411,084 salary, which is 4.8% higher than his predecessor, Marye Anne Fox. In addition, Pradeep Khosla, now the engineering dean at Carnegie Mellon University, will receive a relocation bonus of nearly $24,700 annually for his first four years.

The California Science Center has received what officials describe as an "extraordinary" financial contribution to the new Air and Space Center that will house the space shuttle Endeavour. The gift, to be announced at a news conference Thursday, comes from a foundation chaired by Lynda Oschin, wife of the late Los Angeles businessman and philanthropist Samuel Oschin, whose name already graces the Griffith Observatory planetarium and the Cedars-Sinai Medical Center cancer institute stemming from charitable contributions there.

Watching Alzheimer's disease steal away the memory, talents and very selves of its victims is hard enough for the people who love them. Now, a new pill formulated by a respected pharmaceutical company and approved by the Food and Drug Administration will do little to help most patients and will bring misery to some, say two medical investigators. The drug, Aricept 23 mg, is no more effective on the whole than the disappointing ones already on the market - but is more likely to cause gastrointestinal problems, wrote Drs. Steven Woloshin and Lisa Schwartz of Dartmouth Medical College in an article published Thursday in the medical journal BMJ. The new formulation was devised to serve commercial objectives, they say, and was approved despite a poor showing in company-sponsored tests.

"Oh, you mean the guy with the 70-year-old head and the 20-year-old body-builder body? That picture has got to be Photoshopped." Dr. Jeffry Life smiles when I tell him about the general reaction I get about the famous picture of him with his shirt off, the shot that turned a mild-mannered doctor in his mid-60s into a poster boy for super-fit aging and controversial hormone replacement Appearing in medical-clinic ads in airline magazines and...

CADIZ, Calif. - Three decades ago a group of businessmen pored over NASA satellite imagery as part of a worldwide hunt for large groundwater reserves they could tap to grow desert crops. They found the signs they were looking for here in the sun-blasted mountain ranges and creosote-freckled valleys of the Mojave Desert, 200 miles east of Los Angeles. The group, which founded Cadiz Inc., bought old railroad land, drilled wells and planted neat grids of citrus trees and grapevines, irrigating them with water that bubbled out of the desert depths at the rate of 2,000 gallons a minute.

Researchers have some reassuring news for the legions of coffee drinkers who can't get through the day without a latte, cappuccino, iced mocha, double-shot of espresso or a plain old cuppa joe: That coffee habit may help you live longer. A new study that tracked the health and coffee consumption of more than 400,000 older adults for nearly 14 years found that java drinkers were less likely to die during the study than their counterparts who eschewed the brew. In fact, men and women who averaged four or five cups of coffee per day had the lowest risk of death, according to a report in Thursday's edition of the New England Journal of Medicine.