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The day a signal came from space – level 1
15-08-1977It is August 15, 1977. An American astronomer looks at the...
The day a signal came from space – level 2
15-08-1977On August 15, 1977, American astronomer Jerry Ehman looked at the...
The day a signal came from space – level 3
15-08-1977On August 15, 1977, American astronomer Jerry Ehman carried out an...
The day the order to kill the Polish elite was signed – level 1
05-03-1940It is September 1, 1939. Germany attacks Poland. Two weeks later,...
The day the order to kill the Polish elite was signed – level 2
05-03-1940In August 1939, the Soviet Union and Germany signed a non-aggression...
The day the order to kill the Polish elite was signed – level 3
05-03-1940In August 1939, the Soviet Union and Germany signed a non-aggression...
The day the first public TV started – level 1
02-11-1936It is 1936. The BBC needs a company who can send...
The day the first public TV started – level 2
02-11-1936It is 1936 and there is a big competition in Britain....
The day the first public TV started – level 3
02-11-1936It is 1936 and a big competition is culminating in Britain....
The day the Sydney Opera House opened – level 1
20-10-1973The Sydney Opera House is a very special building. When people...
