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Females Shut Down Male-Male Sperm Competition in Leafcutter Ants

Females Shut Down Male-Male Sperm Competition in Leafcutter Ants

“Two things appear to be going on here,” explains Jacobus Boomsma, professor at the University of Copenhagen and Research Associate at STRI. “Right after mating there is competition between sperm from different males. Sperm is expendable. Later, sperm becomes very precious to the female who will continue to use it for many years to fertilize her own eggs, producing the millions of workers it takes to maintain her colony.” [...more]

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Medieval book is important resource for how plants were once collected, treated and used

Medieval book is important resource for how plants were once collected, treated and used

Latinus 9333 is the Latin translation of the so-called Tacuinum sanitatis, a medieval handbook on wellness written in Arabic by the 11th-century physician ibn Butlan. It deals with factors influencing human health: from the air, the environment and food, to physical exercise and sexual activity. [...more]

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Researchers compile colorful on-line guide to marine algae of Panama

Researchers compile colorful on-line guide to marine algae of Panama

“Our guide celebrates the beauty of some of the most attractive inhabitants of Panama’s undersea realm and provides an indispensable, easy-to-use tool for their identification,” say the Littlers. [...more]

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This short video of an ocelot was taken by Smithsonian scientists during a recent camera-trap survey of these animals in the Peruvian Amazon.[...more]

(Courtesy of Joseph Kolowski)
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