The rich, shimmering colors of some butterfly wings are produced not by pigments, but by a special geometric formation of cells, a new study suggests.
The iridescence of butterfly wings will soon see use as security patches on banknotes. Scientists have unlocked the secrets behind the microscopic structure that makes simultaneous colors possible.
Researchers have built and flown a replica of a swallowtail butterfly to see how it flies.
A mustache on a butterfly has tipped off museum curators that a specimen in belongs to a new species.
Creation of new species through hybridization was thought to be common only in plants, and rare in animals.
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