By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
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Sharks, like other fish, have their reproductive organs in their chests.
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Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
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Condoms were originally made of animal intestines or linen.
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