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Scientists discriped blood circulation using animals.
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Scientists proved living things need air to survive by testing on animals.
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In the United Kingdom Parliament passed the Cruelty to Animals Act, the first regulating act passed.
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By testing on sheep scientists discovered germs are harmful, and can cause sickness.
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Sciendtists discovered Insulin a treatment for Diabetes, by testing on dogs, and cows.
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By testing on animals scientists discovered a polio vaccine.
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Making it a law that all labs testing on animals must be registered. Also setting standards of care for animals
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Produced a guide for animal testing, in the wake of the Thalidomide Tragedy
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Doctors atempted replacing a heart valve inside a dog.
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Setting higher standards for animals being tested on in labs.
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