The mapping of Mars’ surface began.
Mariner 9 started mapping over 85% of the surface area of Mars on this day.
Source
Martin Luther King Jr. pushed hard to encourage the registration of black voters in Selma.
The US & Canada agreed to divert the Niagara River to protect the Niagara Falls from eroding.
The World Health Organization (WHO) announced that gaming addiction is a Mental Health Disorder.
A patent was awarded to Willis Carrier, which gave us the world’s first Air Conditioner.
Prolific serial killer Peter Sutcliffe, also known as the 'Yorkshire Ripper,' was arrested in Sheffield, UK.
