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Biophysics

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crested pigeon flying

BEAT IT  Crested pigeons coordinate their escapes with wing sounds rather than vocal calls. The sound production is tied to wing movement during takeoff, and thus a highly reliable alarm signal, researchers say.

Alnetoidia alneti

HIDDEN IN PLAIN SIGHT  Insects called leafhoppers (Alnetoidia alneti shown) produce microscopic, antireflective spheres that the bugs rub onto their eggs to camouflage them.

halo flower

BLUE HALO  Bees can easily learn to recognize a bluish tinge called a blue halo created by sloppy nanoscale structures (located in the dark center circle, and seen at right) on such flowers as Ursinia speciosa

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