The way the Earth changes its tilt. See 'A Brief History of Climate Change'.
Obliquity
Fact of the Day
Pounds, shillings and pence were rooted in Roman librae, solidi and denarii. This is where the abbreviation LSD comes from.
Quote of the Day
"Foul as it is, hell itself is made more foul by the presence of John.
"
~ Matthew Paris (13th century chronicler) on King John
On This Day
1846 Scottish surgeon Robert Liston was the first European to use anaesthesia during an amputation. He could amputate a leg in two and a half minutes.
1898 Scientists Pierre and Marie Curie discovered the radioactive element radium.
1937 'Snow White and the Seven Dwarfs', the world's first full-length animated film, premiered in the USA
1946 A tsunami caused by an undersea earthquake killed at least 1,362 and left thousands homeless in Japan.
1967 Louis Washkansky, the first man to undergo a heart transplant, died in Cape Town, South Africa, 18 days after his operation.
1988 Pan Am Flight 103 exploded as it was flying over Lockerbie, Scotland. All 243 passengers and 16 crew, and 11 residents of Lockerbie were killed