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The day the Berlin Wall fell – level 1
09-11-1989It is August 13, 1961. East German police put wire between...
The day the Berlin Wall fell – level 2
09-11-1989On August 13, 1961, East German police start to put wire...
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...
The day the first tourist went to space – level 1
28-04-2001When Dennis Tito is a boy, he likes to watch the...
The day the first tourist went to space – level 2
28-04-2001People were always fascinated by the night sky full of stars....
The day the first tourist went to space – level 3
28-04-2001People were always fascinated by the night sky full of stars....
The day HIV was discovered – level 1
23-04-1984In 1981, five men from Los Angeles have a strange disease....
