Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
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By weight, Bone is five times stronger than steel.
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‘Fracture putty’ is a material being developed that when packed in & around a bone fracture, provides full load bearing strength within days.
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