The Outer Space Treaty was signed to prevent the use of nuclear weapons being utilized in space.
Source
President Donald Trump banned citizens of seven countries from entering the US.
Leningrad's siege by Germans ended in the wake of 650,000 perished citizens.
A patent for his electric lamp invention was given to Thomas Edison.
Scottish schoolmaster Dr. John Fian who had 'a pact with the devil,' was found guilty of witchcraft.
The theory of Wave Mechanics by physicist Erwin Schrödinger was first taught in lectures.
