Events
1801 - Dwarf planet Ceres is discovered by Giuseppe Piazzi.
1925 - Edwin Hubble announces the discovery of galaxies outside the Milky Way.
1983 - The ARPANET officially changes to using the Internet Protocol, creating the Internet.
1985 - The Internet’s Domain Name System is created.
1989 - The Montreal Protocol on Substances That Deplete the Ozone Layer comes into force.
Births
1774 - André Marie Constant Duméril, French zoologist
1854 - Sir James George Frazer, Scottish anthropologist
1876 - Harriet Brooks, Canadian physicist
1878 - Agner Krarup Erlang, Danish scientist and engineer
1917 - Jule Gregory Charney, American meteorologist
Deaths
1800 - Louis-Jean-Marie Daubenton, French naturalist
1817 - Martin Heinrich Klaproth, German chemist
1862 - Mikhail Vasilievich Ostrogradsky, Russian physicist
1894 - Heinrich Rudolf Hertz, German physicist
1931 - Martinus Beijerinck, Dutch microbiologist and botanist
1995 - Eugene Wigner, Hungarian physicist and Nobel Prize laureate
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