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The day the most famous formula was published – level 1
27-09-1905In 1905, Albert Einstein is a young man. He works for...
The day Stanislav Petrov saved the world from the apocalypse – level 3
26-09-1983Stanislav Petrov saved the world in 1983. On September 26, 1983,...
The day of the Tunguska Event – level 1
30-06-1908It is June 30, 1908. A big explosion happens in Siberia....
The day of the Tunguska Event – level 2
30-06-1908On June 30, 1908, one of the biggest and most mysterious...
