1984: Scientist finds Aids virus
The discovery of a virus which may cause Aids, the fatal disease sweeping through America, is hailed as a "monumental breakthrough" in medical research.
1968: Decimal coins reach the high street
The first decimal coins make their way into purses throughout Britain in preparation for replacing the current system of pounds, shillings and pence by 1971.
1998: Martin Luther King killer dies
James Earl Ray, the convicted killer of black American civil rights leader Martin Luther King dies in prison
