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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 of the first US presidential election – level 2
10-01-1789The first US presidential election started on December 15, 1788. It...
The day of the first US presidential election – level 3
10-01-1789The very first US presidential election was the only election that...
The day Caesar crossed the Rubicon – level 2
10-01-49 BCIn the first century BC, Rome was a republic and the...
The day Caesar crossed the Rubicon – level 3
10-01-49 BCRome had already been a republic for over 400 years, covering...
The day bitcoin was created – level 1
03-01-2009Bitcoin is digital money. It starts on January 3, 2009. Satoshi...
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,...
