In 2002 the Antarctic Peninsula's Larsen-B ice shelf collapsed. Between 28 February and 8 March 2008, about 570 km2 (220 sq mi) of ice from the Wilkins Ice Shelf on the southwest part of the peninsula collapsed, putting the remaining 15,000 km2 (5,800 sq mi) of the ice shelf at risk. The ice was being held back by a "thread" of ice about 6 km (4 mi) wide, prior to its collapse on 5 April 2009. According to NASA, the most widespread Antarctic surface melting of the past 30 years occurred in 2005, when an area of ice comparable in size to California briefly melted and refroze; this may have resulted from temperatures rising to as high as 5 C (41 F).
When did the most widespread melting of ice occur?
2005

In the United States, federalism originally referred to belief in a stronger central government. When the U.S. Constitution was being drafted, the Federalist Party supported a stronger central government, while "Anti-Federalists" wanted a weaker central government. This is very different from the modern usage of "federalism" in Europe and the United States. The distinction stems from the fact that "federalism" is situated in the middle of the political spectrum between a confederacy and a unitary state. The U.S. Constitution was written as a reaction to the Articles of Confederation, under which the United States was a loose confederation with a weak central government.
On the political spectrum, where does federalism stand?
federalism" is situated in the middle of the political spectrum between a confederacy and a unitary state

Kato Kiyomasa was one of the most powerful and well-known lords of the Sengoku Era. He commanded most of Japan's major clans during the invasion of Korea (15921598). In a handbook he addressed to "all samurai, regardless of rank" he told his followers that a warrior's only duty in life was to "...grasp the long and the short swords and to die". He also ordered his followers to put forth great effort in studying the military classics, especially those related to loyalty and filial piety. He is best known for his quote: "If a man does not investigate into the matter of Bushido daily, it will be difficult for him to die a brave and manly death. Thus it is essential to engrave this business of the warrior into one's mind well."
When did Japan finish invading Korea?
1598