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The day of a successful vaccination – level 1
14-05-1796Smallpox is a very dangerous illness. It kills people. Cowpox is...
The day of a successful vaccination – level 2
14-05-1796Smallpox was a very dangerous disease which killed millions of people....
The day of a successful vaccination – level 3
14-05-1796Smallpox was a deadly and highly infectious disease that had killed...
The day the car was faster than the speed of sound – level 1
15-10-1997Some people like speed. At the end of the 19th century,...
The day the car was faster than the speed of sound – level 2
15-10-1997People are always fascinated by speed. Thanks to the technological progress...
The day a private spaceship flew to space – level 3
29-09-2004X Prize was a space competition announced in 1995. It successfully...
The day of the First Geneva Convention – level 2
22-08-1864In 1859, there was a war between France and Austria. On...
The day of the First Geneva Convention – level 1
22-08-1864It is 1859. There is a war between France and Austria....
The day an atomic bomb was dropped on Hiroshima – level 1
06-08-1945It is May 1945. The war in Europe ends. Then the...
The day Nautilus traveled under the North Pole – level 3
03-08-1958On August 3, 1958, the United States Navy submarine Nautilus became...
