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 Ruth Williams
A newly sequenced Neanderthal genome provides insight into the sex lives of human ancestors.
By Bob Grant
Foundation funds have taken up some of the slack left by waning federal budgets, but such grants don’t often cover indirect research costs.
By Abby Olena
Examination of bones found in a Chinese village suggests that domesticated felines lived side-by-side with humans 5,300 years ago.
View the December 2013 contents.
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