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The day Machu Picchu was discovered – level 3

24-07-1911

Around 1450, the Incas built a city high in the Peruvian...



The day the construction of Hoover Dam began – level 1

07-07-1930

On July 7, 1930, the construction of the Hoover Dam starts....



The day the construction of Hoover Dam began – level 2

07-07-1930

On July 7, 1930, the construction of the Hoover Dam began....



The day the construction of Hoover Dam began – level 3

07-07-1930

On July 7, 1930, the construction of the Hoover Dam began....



The day HIV was discovered – level 1

23-04-1984

In 1981, five men from Los Angeles have a strange disease....



The day HIV was discovered – level 2

23-04-1984

In 1981, doctors found that five men from Los Angeles had...



The day HIV was discovered – level 3

23-04-1984

In 1981, five men from Los Angeles were reported to have...



The day Louis XVI was executed – level 1

21-01-1793

It is the eighteenth century. Two groups of people live in...



The day Louis XVI was executed – level 2

21-01-1793

In the eighteenth century, France was a country of two very...



The day Louis XVI was executed – level 3

21-01-1793

In the eighteenth century, France was a country of two very...