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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 first human stepped on the Moon – level 3
21-07-1969In the 1960s, the Soviet Union and the US were rivals...
The day Russia sold Alaska to the United States – level 3
30-03-1867Russians arrived in Alaska in 1741. They established the first permanent...