From the germ theory to Fleming’s moldy petri dish, antibiotics have reshaped medicine and saved millions of lives. But overuse has fueled a dangerous rise in drug-resistant bacteria. Now, scientists ...

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Some of the greatest scientific discoveries haven’t resulted in Nobel Prizes. Louis Pasteur, who lived from 1822 to 1895, is arguably the world’s best-known microbiologist. He is widely credited for ...

In this series, The Week looks at the ideas and innovations that permanently changed the way we see the world. Germ theory refers to the principle that "certain diseases are caused by the invasion of ...