Nov 30

A revolutionary device that can harness energy from slow-moving rivers and ocean currents could provide enough power for the entire world, scientists claim.


Existing technologies require an average current of five or six knots to operate efficiently, while most of the earth’s currents are slower than three knots Photo: AP

The technology can generate electricity in water flowing at a rate of less than one knot - about one mile an hour - meaning it could operate on most waterways and sea beds around the globe.

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Nov 26

UXBRIDGE, Canada - An apparent rapid upswing in ocean acidity in recent years is wiping out coastal species like mussels, a new study has found.


Coral at the Great Barrier Reef. Rising carbon dioxide levels in the world’s oceans due to climate change, combined with rising sea temperatures, could accelerate coral bleaching, destroying some reefs before 2050, said an Australian study in January 2002. (Reuters)

“We’re seeing dramatic changes,” said Timothy Wootton of the Department of Ecology and Evolution at the University of Chicago, lead author of the study published Monday in the Proceedings of the National Academy of Sciences. The study shows increases in ocean acidity that are more than 10 times faster than any prediction.

“It appears that we’ve crossed a threshold where the ocean can no longer buffer the effects of CO2 in the atmosphere,” Wootton told IPS.

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Nov 21


The journey of a thousand miles begins with a single step.  -  Lao Tzu

A naturally occuring substance that can create “immortal cells” could be the key to finding a real elixir of youth, scientists claim.

Researchers believe boosting the amount of a naturally forming enzyme in the body could prevent cells dying and so lead to extended, healthier, lifespans..

The protein telomerase helps maintain the protective caps at the ends of chromosomes which act like the ends of shoelaces and stop them unravelling.

As we age, and our cells divide, these caps become frayed and shorter and eventually are so damaged that the cell dies. Scientists believe boosting our natural levels of telomerase could rejuvenate them.

A team at the Spanish National Cancer Centre in Madrid tested the theory on mice and found that those genetically engineered to produce 10 times the normal levels of telomerase lived 50 per cent longer than normal.

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Nov 21

A mountain on Mars
A mountain in the eastern Hellas region of Mars

Huge glaciers up to half a mile thick have been discovered close to the equator of Mars and are thought to be the remnants of an ice age on the planet.

The glaciers are thought to have been formed up to 100 million years ago and are the “most dramatic” evidence yet of climate change on Mars.

Hundreds of glaciers have been identified by researchers using ground-penetrating radar that allows them to see through a rocky layer of debris covering the ice.

The biggest of the glaciers are up to 13 miles long and more than 60 miles wide and represent a potential source of water for astronauts on missions to Mars.

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Nov 19


Claudia Castillo, the patient in the ground-breaking operation. Photo: AP

PARIS — Physicians at four European universities have completed what they say is the first successful transplant of a human windpipe using a patient’s own stem cells to fashion an organ and prevent its rejection by her immune system, according to an article in the British medical journal The Lancet. One of the physicians said the surgery could herald a “new age in surgical care.”

The transplant operation was performed on the patient, Claudia Castillo, in June in Barcelona, Spain, to alleviate an acute shortage of breath caused by a failing airway following severe tuberculosis. It followed weeks of preparation carried out at the universities of Barcelona, Spain, Bristol, England and Padua and Milan in Italy.

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Nov 14

It has plagued scientists and politicians for decades, but scientists now say global warming is not the problem.

We are actually heading for the next Ice Age, they claim.

British and Canadian experts warned the big freeze could bury the east of Britain in 6,000ft of ice.


A taste of the future: Plunging temperatures around Britain created dramatic 2-ft icicles over Sleightholme River in County Durham

Most of Scotland, Northern Ireland and England could be covered in 3,000ft-thick ice fields.

The expanses could reach 6,000ft from Aberdeen to Kent - towering above Ben Nevis, Britain’s tallest mountain.

And what’s more, the experts blame the global change on falling - rather than climbing - levels of greenhouse gases.

Lead author Thomas Crowley from the University of Edinburgh and Canadian colleague William Hyde say that currently vilified greenhouse gases - such as carbon dioxide - could actually be the key to averting the chill.

The warning, published in the authoritative journal Nature, is based on records of tiny marine fossils and the earth’s shifting orbit.


The Big chill: Experts warn that 3,000ft ice sheets could cover most of Britain

The Earth has seen dramatic climate fluctuations - veering between cold and warm extremes - over the past three million years, the researchers say.

And changes in the Earth’s orbit and slowly falling levels of carbon dioxide are the cause.

The team says we are approaching a turning point, in the next 10,000 to 100,000 years, which will lead to the new ice sheets smothering much of Europe, Asia and South America.

The theory, which is based on computer models, suggests ice sheets will also slash sea levels by up to 300m, so Russia and Alaska will be connected by land.

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Sep 17

Groups Raise Questions About the Safety of Bisphenol A

Reviewed by Louise Chang, MD

Sept. 16, 2008 — Researchers and environmental groups attacked the FDA for concluding that a widely used plastic ingredient is safe for humans, saying the agency ignored critical studies showing potential ill health effects.

The comments came at a hearing called by the FDA to examine the science around bisphenol A (BPA). The chemical is used in hard plastic products, including some baby and water bottles, and is also used to line metal food cans.

A growing number of advocacy groups and some members of Congress have called on regulators to ban bisphenol A.

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Sep 16

Bisphenol A previously associated with developmental problems in fetuses

TUESDAY, Sept. 16 (HealthDay News) — Bisphenol A (BPA), a chemical found in plastics that include baby bottles and packaging for food and beverages, may put people at risk for heart disease and type 2 diabetes, a new study concludes.

Adding to the controversy surrounding this ubiquitous chemical, this study fuels the fears of those who want it banned. However, the U.S. Food and Drug Administration said in April that BPA was “safe and that exposure levels to BPA from food contact materials, including for infants and children, are below those that may cause health effects.”

The research, published in the Sept. 16 issue of the Journal of the American Medical Association, was released early to coincide with a public hearing the FDA is holding on the issue Tuesday.

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Sep 14

The year is shaping up to be the worst in Southern California since 2004.

Jack Austin doesn’t remember a mosquito biting him. The 72-year-old Duarte resident also doesn’t remember the nine days he spent in the hospital in July or much of the 20 days he spent in rehab in August, recovering from West Nile neuroinvasive disease.

“One day I was fine, and the next day I fell and hit my head and was out of it,” he said. “The virus came on — boom — and it hit me fast.”

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Sep 13

From
September 13, 2008

Hackers have broken into one of the computer networks of the Large Hadron Collider (LHC).

A group calling itself the Greek Security Team left a rogue webpage describing the technicians responsible for computer security at the giant atom smasher as “schoolkids” - but reassuring scientists that they did not want to disrupt the experiment.

The hackers gained access to a website open to other scientists on Wednesday as the LHC passed its first test, sending its protons off on their dizzying journey through time and space, close to the speed of light.

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