The year 1672 in science and technology involved some significant events.

Astronomy

• February 6 – Isaac Newton submits his first paper on optics to the Royal Society of London.^[1]
• December 23 – Giovanni Cassini discovers Rhea, a satellite of Saturn.
• John Flamsteed determines the solar parallax from observations of Mars.

Botany

• Robert Morison publishes Plantarum Umbelliferarum Distributio Nova, per Tabulas Cognationis et Affinitatis, ex Libra Naturae observata et detecta, the first monograph devoted to a specific group of plants, the Umbelliferae.^[2]

Mathematics

• Georg Mohr publishes the Mohr–Mascheroni theorem, that any geometric construction that can be performed by a compass and straightedge can be performed by a compass alone.^[3][4]

Medicine

• Paul Barbette publishes Opera omnia medica et chirurgica.
• Richard Lower publishes De Catarrhis, the first scholarly attempt by an English physician to take a classical doctrine (the theory that nasal catarrh is caused by secretions overspilling from the brain) and to disprove it by scientific experiment.
• Dutch physician Regnier de Graaf describes the female reproductive system.^[5]
• Isbrand van Diemerbroeck publishes the first edition of his Anatome corporis humani in Utrecht.
• Thomas Willis publishes the earliest English work on medical psychology, Two Discourses concerning The Soul of Brutes, Which is that of the Vital and Sensitive of Man.^[6]

Technology

• Dutch painter Jan van der Heyden improves the fire hose, with his brother Nicolaes, a hydraulic engineer.

Institutions

• January 11 – Isaac Newton is elected a Fellow of the Royal Society of London^[7] and it then demonstrates his reflecting telescope to King Charles II of England.

Births

• February 13 – Étienne François Geoffroy, French chemist (died 1731)
• August 2 – Johann Jakob Scheuchzer, Swiss natural historian (died 1733)
• Ann Baynard, English natural philosopher (died 1697)

Deaths

• March – Peter Blondeau, French-born pioneer of mechanised minting of coin
• April 26 – Lionel Lockyer, English quack doctor (born c. 1600)
• July 3 – Francis Willughby, English ornithologist and ichthyologist, pleurisy (born 1635)
• November 19 – John Wilkins, English bishop and natural philosopher, co-founder of the Royal Society (born 1614)
• late – Semyon Dezhnev, Pomor navigator who in 1648 made the first recorded voyage through the Bering Strait (born c. 1605)