A way of finding out how old volcanic rock is.
Potassium/argon dating
Fact of the Day
The Tudor Privy Council would sometimes punish those who fell out of its favour by making them wait to be seen by the Star Chamber for days, weeks, or months in London, during which time they would run up huge lodging bills. Wolsey made De Carteret of Guernsey wait for over four years.
Quote of the Day
"Is life not a hundred times too short - to get bored?
"
~ Nietzsche
On This Day
1787 The 'First Fleet' of 11 ships carrying convicts to Australia left England.
1888 Slavery was abolished in Brazil.