What's considered hygienic can change quite a bit over time. The ancient Romans cleaned themselves with oil and a big hook, ...

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Diseases were untreatable, sometimes even unrecognized. Without a germ theory of disease, people did not take precautions to prevent the spread of infections. But the Industrial Revolution ...

At the beginning of the 19th century, though there had been some advances in medical knowledge, scientists still did not understand what caused disease. Joseph Lister was able to make a much more ...

At the beginning of the 19th century, though there had been some advances in medical knowledge, scientists still did not understand what caused disease. However, the production of better quality ...