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The day the longest railway tunnel was opened – level 2
01-06-2001The longest railway tunnel in the world is in Switzerland. Its...
The day the longest railway tunnel was opened – level 3
01-06-2001The Gotthard Base Tunnel is in Switzerland and it runs under...
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 Mount St. Helens erupts – level 3
18-05-1980On March 15, 1980, several small earthquakes indicated that magma may...
The day the first national park was established – level 2
01-03-1872Yellowstone National Park is a beautiful place. In 1805, the first...
The day the first national park was established – level 3
01-03-1872Yellowstone National Park is a beautiful place. In 1805, the first...
The day the serum arrived at Nome – level 2
02-02-1925In January 1925, the city of Nome located in Alaska had...
The day the serum arrived at Nome – level 3
02-02-1925In mid-January 1925, the remote city of Nome, Alaska faced an...
The day the Golden Gate Bridge construction started – level 3
05-01-1933The Golden Gate Bridge is one of the most internationally recognized...
