Measuring an isotope of carbon to find out how old an organic object is. See 'Some Notes on Archaeology'.
Radiocarbon dating
Fact of the Day
During the Napoleonic Wars, the Royal Navy used c. 80,000 barrels of gunpowder every year.
Quote of the Day
"A French bastard arriving with armed banditti and establishing himself the King of England against the consent of the natives is in plain terms a very paltry rascally original and certainly has no divinity in it.
"
~ Thomas Paine, 1776
On This Day
1536 The trial of four of Anne Boleyn's 'lovers'. Only one confessed (under torture), which he maintained up to the point of his death.
1689 William III went to war with France. It was the start of more than a century of titanic clashes for global hegemony.
1789 William Wilberforce made his first speech to the Commons on the abolition of slavery.
1926 Limited power of unions shown as TUC calls off General Strike without consulting miners, who went back to work in November on reduced pay.
1937 In a ceremony that had originally been scheduled for his brother, Edward VIII (who had abdicated in December 1936), George VI was crowned at Westminster Abbey.
1969 The minimum voting age in Britain was reduced from 21 to 18.
1994 The popular Labour leader John Smith died of a heart attack. He was replaced as leader by Tony Blair.