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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 of the Tunguska Event – level 3
30-06-1908On June 30, 1908, one of the largest and most mysterious...
The day people started to make the deepest hole – level 1
24-05-1970The deepest hole made by people is in Russia. The name...
The day Mount St. Helens erupts – level 1
18-05-1980Mount St. Helens is a volcano. It is in the US....
The day Mount St. Helens erupts – level 2
18-05-1980In March 1980, there were several small earthquakes near Mount St....
The day of the Chernobyl disaster – level 1
26-04-1986Chernobyl is in Ukraine. There is a nuclear power plant in...
The day of the Chernobyl disaster – level 2
26-04-1986The Chernobyl nuclear power plant was located 100 kilometers from Kyiv...
The day of the Chernobyl disaster – level 3
26-04-1986The Chernobyl nuclear power plant was located 100 kilometers from Kyiv,...
The day the Hubble Space Telescope was taken to space – level 2
24-04-1990On April 24, 1990, the Hubble Space Telescope was taken to...
