The Biological Weapons Convention comes into force.
WikiWikiWeb, the world’s first wiki is made public by Ward Cunningham.
The Comet Shoemaker–Levy 9 is first discovered.
Aeroflot Flight 593 crashed in, Kemerovo Oblast, Russia, killing 75.
In Eisenstadt v. Baird, the United States Supreme Court decides that unmarried persons have the right to have contraceptives.
The Butler Act prohibits the teaching of human evolution in Tennessee.
The FDA approves the anti-AIDS drug, AZT.
The First Taranaki War ends in New Zealand.
American Express is founded by Henry Wells and William Fargo.
The USA launched the Vanguard 1 satellite.