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The day the lowest temperature was recorded on Earth – level 2
21-07-1983The lowest temperature ever recorded on Earth was on July 21,...
The day the lowest temperature was recorded on Earth – level 3
21-07-1983The lowest temperature ever recorded on Earth was on July 21,...
The day the first human stepped on the Moon – level 1
21-07-1969The US and the Soviet Union are big rivals in the...
The day the first human stepped on the Moon – level 2
21-07-1969In the 1960s, the US and the Soviet Union were big...
The day the construction of Hoover Dam began – level 3
07-07-1930On July 7, 1930, the construction of the Hoover Dam began....
The day the bicycle was invented – level 2
12-06-1817The invention of the bicycle was a long process. It was...
The day the bicycle was invented – level 3
12-06-1817The invention of the bicycle was a gradual process that took...
