Surprising new research about the act of remembering may help people with post-traumatic stress disorder By Greg MillerPhotographs by Gilles MingassonSmithsonian magazine, May 2010
A series of earthquakes that hit the North American heartland nearly 200 years ago were considerably smaller than reported in the history books, according to research presented at a meeting this week.
Herd immunity - animation This animation demonstrates how herd immunity is achieved. If you can't view this animation, you may need to download: Adobe Flash Player version 7 or aboveA Javascript capable web browser. For details of compatible web browsers, go here.
Hookworm is an intestinal parasite of humans that causes mild diarrhea and abdominal pain. Heavy infection with hookworm can create serious health problems for newborns, children, pregnant women, and persons who are malnourished. Hookworm infections occur mostly in tropical and subtropical climates. In 2002, the estimated number of person infected with hookworm was 1.3 billion.
Download MP3 A global campaign to eradicate Guinea worm disease is tantalizingly close to success. The parasitic infection, caused by a worm that can grow three feet long before it emerges from a patient’s body, now affects just a few thousand people per year. Almost all of the remaining cases are in Southern Sudan. Former U.S. President Jimmy Carter, who has helped lead the campaign, went there in February. The World’s David Baron was there too.
The sound track for yesterday’s run was a talk by primatologist Richard Wrangham1, author of Catching fire: how cooking made us human. Cooking, he says, has long been thought to be an optional cultural practice, like wearing jewelry. But really, he argues, cooking was the essential technological innovation that enabled us to produce the metabolic energy we needed to become human.
This counterintuitive finding from the first study of long-term changes in hearing loss is that for every five years a man or woman was born later in the 20th century, their chance of having hearing impairment dropped 13 percent and 6 percent, respectively.
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