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In May 1983, the first scientific papers were published describing the possible connection between a retrovirus and the development of AIDS. The virus went on to become known as HIV. Experts discuss whether, 25 years later, scientists any closer to a cure for AIDS or to a vaccine to prevent HIV transmission.

What made the Sahara Desert go dry — and are there ancient waters still hidden below the sands? In a controversial study published in the journal Science researchers argue that the drying of the Sahara took place over thousands of years — not suddenly as was previously thought.

Introductory electronics classes focus on circuit diagrams involving combinations of resistors, capacitors and inductors. Now, researchers have discovered a fourth passive circuit element — one that fills in a gap in equations describing relationships between voltage, current and magnetic flux.

Researchers report that atrazine, the second-most-applied weedkiller in the U.S., may be able to disrupt hormonal signaling in humans. The herbicide, which has been banned in Europe, is suspected of playing a role in sexual abnormalities in fish, frogs and other aquatic organisms.

When it comes to greenhouse gas emissions, what you eat may be more important than where your food comes from. A new study finds that replacing red meat and dairy products with chicken, fish or vegetables could have the same impact as shifting to an entirely locally-grown diet.

In February 2009, all full-power broadcast television stations in the U.S. will stop analog transmissions and begin broadcasting only in digital. Viewers who have cable or satellite are fine, but those who have older TVs receiving over-the-air signals may need to buy converters.

Source: www.sacbee.com --- Tuesday, May 06, 2008
WASHINGTON – The threat of death-defying bacteria, stubborn organisms that refuse to be conquered by Antibiotics, is growing more alarming. ...

Source: www.amednews.com --- Sunday, May 04, 2008
Clay and alligators are among things researchers are exploring to stop resistant infections. Physician groups continue to stress the importance of appropriate prescribing. ...

Women living in America's poorest counties have seen their average life expectancy decline in recent years. New research shows that the gaps between the best-off and worst-off groups are widening — as much as 18 years between the two — in connection with smoking, high blood pressure and obesity.