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The day HIV was discovered – level 2
23-04-1984In 1981, doctors found that five men from Los Angeles had...
The day of the first published photograph of a black hole – level 3
10-04-2019The first black hole that was photographed is located at the...
The day of the Smolensk air disaster – level 3
10-04-2010On April 10, 2010, a Polish government plane headed to Russia...
The day Alcatraz was closed – level 3
21-03-1963In 1934, Alcatraz prison was opened in the United States. It...
The day gambling was legalized in Las Vegas – level 3
19-03-1931In the early 20th century, Las Vegas was a small town...
The day of the Phoenix Lights – level 3
13-03-1997On the evening of March 13, 1997, strange big lights began...
The day of the Space Shuttle Columbia disaster – level 2
01-02-2003On January 16, 2003, six astronauts from the US and one...
The day Oswiecim concentration camp was liberated – level 2
27-01-1945Discrimination against Jews began after Hitler came to power in 1933....
The day Raoul Wallenberg was arrested – level 2
17-01-1945At the end of World War II, Hitler wanted to send...
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...
