14th century AD: French priest Jean Buridan provides a basic explanation of the price system. Philosophy of science [ edit ] 1220s - Robert Grosseteste writes on optics, and the production of lenses, while asserting models should be developed from observations, and predictions of those models verified through observation, in a precursor to the ...
The plague returned at intervals with varying virulence and mortality until the early 19th century. In England, for example, the plague returned in 1360–63, killing 20% of Londoners, and in 1369, killing 10–15%. At the end of the 16th century, the plague hit San Cristóbal de La Laguna (1582–83) in the Canary Islands.
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