13th Century
- 1220–1235 – Robert Grosseteste: rudimentals of the scientific method (see also: Roger Bacon)
- 1242 – Ibn al-Nafis: pulmonary circulation and circulatory system
- Theodoric of Freiberg: correct explanation of rainbow phenomenon
- William of Saint-Cloud: pioneering use of camera obscura to view solar eclipses
Read more about this topic: Timeline Of Scientific Discoveries
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