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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: A Caste System That Wriggles
14 September 2010 7:01 pm
When Himasthla species B meets the California horn snail, things get ugly. The body snatching flatworm invades the snail's gonads, starts breeding, and eventually takes over the mollusk's entire body, foraging, eating, and growing along with it. Now researchers have found an even more impressive Himasthla trait: a surprisingly complex social structure. Reporting online tomorrow in the Proceedings of the Royal Society B, a team finds that Himasthla colonies are divided between a class of reproducers that are large and sluglike, and a soldier class that have skinny bodies, huge mouths, and never reproduce. The soldiers viciously defend the colony from other flatworm groups or species that would take over their host, swallowing enemies whole (as seen above). This caste system puts flatworms in the company of animals renown for their complex societies, such as termites and bees. Not bad for a creature with just a couple of ganglia for a brain.
See more ScienceShots.