The year1665 inscience andtechnology involved some significant events.

• Summer –Isaac Newton graduates from theUniversity of Cambridge which is then closed as a precaution againstbubonic plague so he retires to his birthplace atWoolsthorpe-by-Colsterworth to develop his theories oncalculus,optics and thelaw of gravitation.

• Giovanni Cassini discoveredJupiter'sred spot was a permanent feature and used this to measure Jupiter's period of rotation as 9 hours 56 minutes.^[1]

• Publication of the 'Atlas Maior' (Theatrum Orbis Terrarum) completed byJoan Blaeu inAmsterdam.

• April 12 – First recorded victim of the 'Great Plague of London' (1665–66), the last major outbreak ofbubonic plague in theBritish Isles.

• September –Robert Hooke'sMicrographia published, first applying the term 'cell' to plant tissue, which he discovered first in cork, then in living organisms, using amicroscope.

• Athanasius Kircher inMundus Subterraneus (publication of which begins in Amsterdam) describes giant bones as those belonging to extinct races of humans.^[2]

• January 5 – TheJournal des sçavans begins publication inFrance, the first scientific journal.
• March 6 – ThePhilosophical Transactions of theRoyal Society of London begins publication inEngland under the editorship ofHenry Oldenburg, the first scientific journal inEnglish and the oldest to be continuously published.

• May 1 –John Woodward,Englishnaturalist andphysician (died1728)
• approx. date –James Petiver, English naturalist andapothecary (died1718)

• January 12 –Pierre de Fermat,Frenchmathematician (born1607)
• November 18 –Blaise Francois Pagan, Frenchmilitary engineer (born1603)

• 1665 in science
• 17th century in science
• 1660s in science

• Articles with short description
• Short description is different from Wikidata