Cycles in the Earth's climate, caused by changes in its relationship with the Sun.
The Milankovitch Cycles
Fact of the Day
Novelist Agatha Christie was a keen surfer.
Quote of the Day
"A man must needs close his eyes and clench his teeth, wry-mouthed and shuddering, and filtering the stuff rather than drinking.
"
~ Peter of Blois, 12th century, on English wine
On This Day
1537 Henry VIII's third wife, Jane Seymour, died of a fever following the birth of her son.
1648 The Treaty of Westphalia marked the end of the Thirty Years War. The first six months of the peace conference was spent arguing about protocol.
1901 Annie Edson Taylor, a 63 year old schoolteacher was the first person to plunge over Niagara Falls in a barrel.
1945 The United Nations was founded.
2003 Concorde completed its final commercial passenger flight.