There is no better place to watch science in action than in the world of medicine. It was discovered in the 1930s that blood, in the presence of a certain streptococcus bacteria, did not clot. The agent formed by the bacteria was isolated and eventually called streptokinase, the first "clot-buster." Through the decades, pharmaceutical companies created other similar drugs, but the overall use was still fairly infrequent. The early heart ...

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