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The day bitcoin was created – level 2
03-01-2009Bitcoin is a digital currency. It was created on January 3,...
The day bitcoin was created – level 3
03-01-2009Bitcoin is a digital currency. It was created on January 3,...
The day the enemies met at Christmas – level 1
24-12-1914In 1914, World War I starts in Europe. The enemies are...
The day the enemies met at Christmas – level 2
24-12-1914In 1914, World War I started in Europe. The enemies were...
The day the enemies met at Christmas – level 3
24-12-1914In 1914, World War I started in Europe. The continent was...
The day the first gorilla was born in a zoo – level 1
22-12-1956The first gorilla is born in a zoo in 1956. It...
The day the first gorilla was born in a zoo – level 2
22-12-1956The first gorilla was born in a zoo in the United...
The day the first gorilla was born in a zoo – level 3
22-12-1956Gorillas are the closest relatives of humans right after chimpanzees. Their...
The day the plane was invented – level 1
17-12-1903People want to fly. People use balloons with hot air at...
The day the plane was invented – level 2
17-12-1903People always wanted to fly. In the 18th century, it was...
