EntityQ723028· pop 7· linked from 35 articles1644 in scienceSign in to saveoverview of natural science-related events during the year of 1644Connectionslist of years in scienceEntityDenmarkConceptscienceEntitytechnologyEntityLeonhard EulerEntityInternational Standard Book NumberEntityspeed of light in vacuumEntitymathematicianEntityEnglish peopleEntityastronomerEntityOle RømerEntitychemistEntityZutphenEntityhistory of technologyEntityFlemish peopleEntityJan Baptist van HelmontEntitycarillonEntityBasel problemEntityPietro MengoliEntityJacob van EyckEntityCategories1640s in science17th century in science