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Posted by chshkt
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Source
In 2006, as many as 3.5 million people died from acquired immune deficiency syndrome (AIDS), bringing the total of deaths from this disease since 1981 to more than 25 million [source: Avert.org].
Human immunodeficiency virus (HIV), the virus that causes AIDS, attacks healthy immune cells and uses them to duplicate itself. AIDS, the final stage of HIV infection, can weaken a person's immune system so much, he could die from a cold.
Teh Eng Koon/AFP/Getty Images
In 2006, HIV infections killed as many as 3.5 million people.
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Posted by Mae
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Story and photo science.nasa.gov
Магнитни портали свързват Слънцето и Земята
During the time it takes you to read this article, something will happen high overhead that until recently many scientists didn't believe in. A magnetic portal will open, linking Earth to the sun 93 million miles away. Tons of high-energy particles may flow through the opening before it closes again, around the time you reach the end of the page.
"It's called a flux transfer event or 'FTE,'" says space physicist David Sibeck of the Goddard Space Flight Center. "Ten years ago I was pretty sure they didn't exist, but now the evidence is incontrovertible."
Indeed, today Sibeck is telling an international assembly of space physicists at the 2008 Plasma Workshop in Huntsville, Alabama, that FTEs are not just common, but possibly twice as common as anyone had ever imagined.
Read Full Story at science.nasa.gov |
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Posted by Mae
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Internet use 'good for the brain' For middle-aged and older people at least, using the internet helps boost brain power, research suggests.
A University of California Los Angeles team found searching the web stimulated centres in the brain that controlled decision-making and complex reasoning.
The researchers say this might even help to counteract the age-related physiological changes that cause the brain to slow down.
The study features in the American Journal of Geriatric Psychiatry As the brain ages, a number of changes occur, including shrinkage and reductions in cell activity, which can affect performance.
It has long been thought that activities which keep the brain active, such as crossword puzzles, may help minimise that impact - and the latest study suggests that surfing the web can be added to the list.
Lead researcher Professor Gary Small said: "The study results are encouraging, that emerging computerised technologies may have physiological effects and potential benefits for middle-aged and older adults."Internet searching engages complicated brain activity, which may help exercise and improve brain function."
The latest study was based on 24 volunteers aged between 55 and 76. Half were experienced internet users, the rest were not.
See All at: news.bbc.co.uk |
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