Events
1896 – Henri Becquerel discovers radioactivity.
1966 – Venera 3 crashes on Venus becoming the first spacecraft to land on another planet.
1980 – Voyager 1 probe confirms that Janus (moon of Saturn) exists.
Births
1910 – Archer John Porter Martin, English chemist and Nobel Prize laureate
1943 – Richard H. Price, American physicist
1943 – Rashid Sunyaev, Russian physicist
Deaths
1697 – Francesco Redi, Italian physician
1911 – Jacobus Henricus van ’t Hoff, Dutch chemist and Nobel Prize laureate
1966 – Fritz Houtermans, German physicist
1995 – Georges J.F. Kohler, German biologist and Nobel Prize laureate