The iris of a human eye has two layers of fibers, radial fibers that pry the pupil open and sphincter fibers that snap it shut.
By The Scientist Staff | November 13, 2012
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December 24, 2012
By Kerry Grens
Repeated exposure to a harmful fungus can help a proportion of frogs ward off infection.
By Anna Azvolinsky
Mice undernourished during pregnancy can transmit the effects of such nutritional stress to their sons’ germ cells, epigenetically.
By Ruth Williams
Cognitive testing in chimpanzee pedigrees reveals a genetic basis for intelligence.
View the July 2014 contents.
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