On this day

11 November in history.

5 moments from 1572 to 2002: discovery, creativity and courage, each with a source to read more.

5 moments

Mathematician Grigori Perelman in 1993.

2002

Grigori Perelman shares his proof. Russian mathematician Grigori Perelman posted the first part of his proof of the Poincaré conjecture. It is still the only Millennium Prize Problem to be solved, and he later turned down both the prize money and the Fields Medal.

Wikipedia: Grigori Perelman

Photo: George Bergman / Wikimedia Commons (CC BY-SA 4.0)

More from 11 November

  1. Portrait of astronomer Tycho Brahe.

    1572

    Tycho Brahe spots a supernova

    Astronomer Tycho Brahe observed an exploding star, the supernova now known as SN 1572.

    Wikipedia: Tycho BraheWikipedia: SupernovaWikipedia: SN 1572

    Photo: Unknown author / Wikimedia Commons (Public domain)

  2. Portrait of Gottfried Wilhelm Leibniz.

    1675

    Leibniz shows off integral calculus

    Gottfried Leibniz used integral calculus for the first time, working out the area under the graph of y = f(x).

    Wikipedia: Gottfried Wilhelm LeibnizWikipedia: Integral

    Photo: Christoph Bernhard Francke / Wikimedia Commons (Public domain)

  3. 1930

    Einstein and Szilárd patent a fridge

    Albert Einstein and Leó Szilárd received a US patent for the refrigerator they had invented together.

    Wikipedia: PatentWikipedia: Albert EinsteinWikipedia: Leo Szilard

  4. Space Shuttle Columbia landing at Kennedy Space Center.

    1982

    The Space Shuttle starts regular work

    Columbia lifted off from Kennedy Space Center on STS-5, the Space Shuttle program's first operational mission.

    Wikipedia: Space Shuttle ColumbiaWikipedia: Kennedy Space CenterWikipedia: STS-5

    Photo: NASA / Wikimedia Commons (Public domain)

Moments chosen for discovery, creativity and courage. Each one links to a source where you can read more; photos are credited to their owners.