1946 - Stephen Bantu Biko was born.
The = sign was invented by 16th Century Welsh mathematician Robert Recorde, who was fed up with writing "is equal to" in his equa...
1984 - The world's worst industrial disaster took place when 42 tonnes of toxic methyl isocyanate (MIC) gas leaked from the Union Carbide subsidiary pesticide plant in the city of Bhopal, India. More than 500,000 people were exposed to the toxic gases, with the symptoms bearing all the hallmarks of cyanide poisoning.
The first official death toll was 2,259. A more probable figure is that 8,000 people died within two weeks. It is estimated that around 20,000 people have died from gas-related diseases since the disaster.
1992 - The first text message was sent.