A way of finding out how old volcanic rock is.
Potassium/argon dating
Fact of the Day
Novelist Agatha Christie was a keen surfer.
Quote of the Day
"This is not the end. It is not even the beginning of the end. But it is, perhaps, the end of the beginning.
"
~ Winston Churchill on the Battle of Egypt
On This Day
41 Claudius was proclaimed Roman Emperor by the Praetorian Guard.
1327 Edward II was deposed by his wife, Isabella, and her lover, Roger Mortimer. They replaced him with his 10 year old son, Edward III, and for three years they ruled through him.
1533 King Henry VIII secretly married the newly-pregnant Anne Boleyn, even though he was still married to Catherine of Aragon.
1554 Thomas Wyatt gathered 4000 men in Kent, starting the Wyatt Rebellion against Queen Mary and her choice of Spanish husband.
1627 Father of modern chemistry, Robert Boyle, was born in Lismore, County Waterford, Ireland.
1942 Thailand declared war on the United States and Britain following intensive bombing by the Allies.
1945 The German offensive campaign in the Ardennes, which came to be known as the Battle of the Bulge, ended in Allied victory.