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The day the construction of the Tower of Pisa started – level 2
09-08-1173The construction of the Tower of Pisa began on August 9,...
The day the construction of the Tower of Pisa started – level 3
09-08-1173The construction of the Tower of Pisa began on August 9,...
The day the first undersea cable was laid across the Atlantic – level 2
05-08-1858The first undersea telegraph cable was put across the Atlantic on...
The day GPS was fully operational – level 3
17-07-1995The Global Positioning System (GPS) is a satellite system that provides...
The day Disneyland was opened – level 2
17-07-1955On July 17, 1955, Disneyland opened for the first time in...
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 longest bridge was opened – level 3
30-06-2011The Danyang-Kunshan Grand Bridge, located in China, was officially opened to...
