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6 March 2014 1:04 pm ,
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Antiretroviral drugs can protect people from becoming infected by HIV. But so-called pre-exposure prophylaxis, or PrEP...
Two studies show that eating a diet low in protein and high in carbohydrates is linked to a longer, healthier life, and...
Considered an icon of conservation science, researchers at World Wildlife Fund (WWF) headquarters in Washington, D.C.,...
The new atlas, which shows the distribution of important trace metals and other substances, is the first product of...
Early in April, the first of a fleet of environmental monitoring satellites will lift off from Europe's spaceport in...
Since 2000, U.S. government health research agencies have spent almost $1 billion on an effort to churn out thousands...
Magdalena Koziol, a former postdoc at Yale University, was the victim of scientific sabotage. Now, she is suing the...
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ScienceShot: Caterpillar's Guts Crawl Independently of Their Bodies
22 July 2010 12:00 pm
If you've ever ridden a roller coaster or endured an unpleasantly bumpy bus ride, you probably felt your guts move inside your body. In caterpillars, it happens all the time. In a study published online today in Current Biology, researchers report that the insect's gut—a long, thin tube that stretches from head to heel—moves independently of its skin every time it crawls. When a caterpillar inches forward, its two back legs and gut slide forward, causing the middle part of the gut to jump ahead roughly a full segment in the insect's body. After that, the skin arches forward to catch up, as seen in this video. Biologists aren't sure why caterpillars move like this, but they suspect it might have to do with their voracious appetites. A caterpillar's main function in life is to eat and grow. Detaching the gut from most of its legs helps keep movement from interfering with digestion.
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