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
Butchers who sold off meat in medieval London ran the risk of being placed in the pillory and having their meat burnt beneath them, so that the rancid smoke would rise into their face.
Quote of the Day
"Men make their own history, but they do not make it as they please.
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~ Karl Marx
On This Day
1586 American colonists arrived in Plymouth with large quantities of tobacco. Smoking caught on quickly, though it was also used in tea.
1694 The Bank of England was founded by an act of parliament as a way to finance government debt by private subscription.
1943 The concentrated Allied bombing of Hamburg led to a three hour firestorm that killed approx 30,000 civilians.