Search Result For theory
The day HIV was discovered – level 2
23-04-1984In 1981, doctors found that five men from Los Angeles had...
The day HIV was discovered – level 3
23-04-1984In 1981, five men from Los Angeles were reported to have...
The day of the first published photograph of a black hole – level 1
10-04-2019Messier 87 is a galaxy. It is 55 million light-years away...
The day of the first published photograph of a black hole – level 2
10-04-2019The first black hole ever photographed is located at the center...
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 the most famous formula was published – level 1
27-09-1905In 1905, Albert Einstein is a young man. He works for...
The day of the Tunguska Event – level 3
30-06-1908On June 30, 1908, one of the largest and most mysterious...
