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    • Rare books covered with seal skin hint at a medieval trade network

    Rare books covered with seal skin hint at a medieval trade network

    Rare books covered with seal skin hint at a medieval trade network

    Dozens of rare, fur-covered volumes from 12th and 13th century French monasteries are wrapped with seal skins that may have come from as far away as Greenland, researchers report April 9 in Royal Society Open Science.

    Is that shark ticking? In a first, a shark is recorded making noise

    Is that shark ticking? In a first, a shark is recorded making noise

    The clicking of flattened teeth, discovered by accident, could be “the first documented case of deliberate sound production in sharks,” evolutionary biologist Carolin Nieder, of Woods Hole Oceanographic Institution in Massachusetts, and colleagues propose March 26 in Royal Society Open Science.

    Coyotes have the face muscles for that ‘sad-puppy’ look

    Coyotes have the face muscles for that ‘sad-puppy’ look

    The expressive face muscles were found in two coyotes from Pennsylvania and one from Oregon, Courtney Sexton of the Virginia-Maryland College of Veterinary Medicine in Blacksburg, Va., and colleagues say.