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Demonstration of the first incandescent light bulb
Thomas Edison made the first public demonstration of his incandescent light bulb on December 31, 1879 in Menlo Park.

Demonstration of the first transistor
The first workable transistor was demostrated on December 24, 1947. Its creators were employees of Bell Telephone Laboratories company. Their names are now known to the whole world, these are scientists-physicists Walter Brattain, William Shockley and John Bardeen.

Demonstration of the mirror telescope prototype
On October 2, 1608 Hans Lippershey (a German-born Dutch inventor, optician and eyeglass maker, most likely creator of the telescope) presented his invention to the Dutch government. It was the prototype of the modern mirror telescope.

Discovery of X-rays
Om November 8, 1895 Wilhelm Conrad Röntgen discovered X-rays. This happened unexpectedly. Late in the evening when the scientist was going to leave the laboratory and had already turned off the light in the room he suddenly saw a greenish glow in the darkness, fluorescence, which emanated from the screen covered with barium platinum-cyanide crystals.

Finish of the first circumnavigation of the world
On March 2, 1949 the airplane Lucky Lady II (United States Air Force Boeing B-50 Superfortress) became the first one to circle the world nonstop.


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