See also: 1646 in science, other events of 1647, 1648 in science, and the list of years in science.
Astronomy Johannes Hevelius publishes the first comparatively detailed map of the Moon in his Selenographia Births April 2 - Maria Sibylla Merian, German biologist and entomologist who studied the life cycles of butterflies (died 1717) Denis Papin, French physicist and technologist (died c1712) Deaths Evangelista Torricelli, Italian physicist and mathematician (born 1608)
