1644 in science
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The year 1644 AD in science and technology involved some significant events.
Mathematics
- The Basel problem is posed by Pietro Mengoli, and will puzzle mathematicians until solved by Leonhard Euler in 1731.
Publications
- Jan Baptist van Helmont publishes Dageraad ofte Nieuwe Opkomst der Geneeskunst ("Daybreak, or the New Rise of Medicine").
Births
- 25 September – Ole Rømer, Danish astronomer who makes the first quantitative measurements of the speed of light (died 1710)
Deaths
- 2 July – William Gascoigne, English scientist (born 1610)
- 30 December – Jan Baptist van Helmont, Flemish chemist (born 1579)