Niels Bohr (1885–1962) was a Danish physicist who created the Bohr model, the first widely accepted model of atomic structure. A central figure of 20th-century physics, he received the Nobel prize in 1922. In three articles published in 1913, the third in November, he applied old quantum theory to restrict the revolving electrons to stable orbits, creating the Bohr model of the atom. A dozen years later, faced with the opposing particle and wave interpretations of atomic phenomena in the new quantum mechanics, he proposed the complementarity principle of using both interpretations to fully explain the results. He founded the Institute of Theoretical Physics in Copenhagen, now known as the Niels Bohr Institute, and predicted the existence of a new element, which was named hafnium after the Latin name for Copenhagen. Later, the element bohrium was named after him. During the 1930s, he helped refugees from Nazism. In September 1943, after receiving word of his impending arrest by the Germans, he fled to Sweden. Flown next to Britain, he joined the British Tube Alloys nuclear weapons project, and later the Manhattan Project. After the war, Bohr was involved with the establishment of CERN.

Read more: https://en.wikipedia.org/wiki/Niels_Bohr

_______________________________ Today's selected anniversaries:

936:

Shi Jingtang was enthroned as the first emperor of the Later Jin Dynasty by Emperor Taizong of Liao, following a revolt against Emperor Fei of Later Tang. https://en.wikipedia.org/wiki/Shi_Jingtang

1443:

Rebelling against the Ottoman Empire, Skanderbeg and his forces liberated Kruja in Middle Albania and raised the Albanian flag. https://en.wikipedia.org/wiki/Skanderbeg

1925:

The country music radio program Grand Ole Opry was first broadcast on WSM radio in Nashville, Tennessee. https://en.wikipedia.org/wiki/Grand_Ole_Opry

1971:

Prime Minister of Jordan Wasfi al-Tal was assassinated by the Black September unit of the Palestine Liberation Organization in Cairo. https://en.wikipedia.org/wiki/Wasfi_al-Tal

1990:

After being elected as leader of the British Conservative Party one day earlier, John Major officially succeeded Margaret Thatcher as Prime Minister of the United Kingdom. https://en.wikipedia.org/wiki/John_Major

_____________________________ Wiktionary's word of the day:

tractator: 1. (historical) In medieval commerce, the person who handles or transports merchandise on behalf of an investor. 2. A person who writes tracts. https://en.wiktionary.org/wiki/tractator

___________________________ Wikiquote quote of the day:

If the brain were so simple we could understand it, we would be so simple we couldn't.   --David Zindell https://en.wikiquote.org/wiki/David_Zindell