This Day In History
Monday, June 21, 2021
On This Day

Events


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in 1955

Mir Mine, the first...
Mir Mine, the first diamond mine in the USSR, is discovered. Mir Mine also called Mirny Mine is a former open pit diamond mine, now inactive, located in Mirny, Eastern Siberia, Russia. The mine is 525 meters (1,722 ft) deep (4th in the world) and has a diameter of 1,200 m (3,900 ft), and is the second largest excavated hole in the world, after Bingham Canyon Mine. The airspace above the mine is closed for helicopters because of a few incidents in which they were sucked in by the downward air flow.
Mir Mine, diamond

Births

in 1831
James Maxwell

James Clerk Maxwell of Glenlair was a Scottish physicist and mathematician. His most prominent achievement was formulating classical electromagnetic theory. This united all previously unrelated observations, experiments and equations of electricity, magnetism and even optics into a consistent theory.

Deaths

in 1986
Benny Goodman

Benjamin David “Benny” Goodman was an American jazz and swing musician, clarinetist and bandleader; widely known as the "King of Swing".
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