The History of Alaska dates back to the Upper Paleolithic Period (around 12,000 BC), when Asiatic groups crossed the Bering Land Bridge into what is now western Alaska. At the time of European contact by the Russian explorers, the area was populated by Alaska Native groups. The name "Alaska" derives from the Aleut word alaxsxaq, (an Archaic spelling being alyeska), meaning "mainland" (literally, "the object toward which the action of the sea is directed").
In the 1890s, gold rushes in Alaska and the nearby Yukon Territory brought thousands of miners and settlers to Alaska. Alaska was granted territorial status in 1912.
In 1942, three of the outer Aleutian Islandsó Attu and Kiska ówere occupied by the Japanese and their recovery for the U. S. became a matter of national pride. The construction of military bases contributed to the population growth of some Alaskan cities.
Alaska was granted statehood on January 3, 1959.
In 1964, the massive "Good Friday Earthquake" killed 131 people and leveled several villages.
The 1968 discovery of oil at Prudhoe Bay and the 1977 completion of the Trans-Alaska Pipeline led to an oil boom. In 1989, the Exxon Valdez hit a reef in the Prince William Sound, spilling between 11 and 35 million US gallons (42,000 and 130,000 m≥) of crude oil over 1,100 miles (1,600 km) of coastline. Today, the battle between philosophies of development and conservation is seen in the contentious debate over oil drilling in the Arctic National Wildlife Refuge.