DALLAS -- A group of North Texas doctors and scientists printed part of a human femur -- the longest and strongest bone in the body -- that mimics the strength, flexibility and overall mechanics of a ...
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The three images are cross sections of femurs from a marsupial (the Virginia opossum, left), a placental (the eastern chipmunk, center) and a 66-million-year-old multituberculate fossil (right). The ...