Alaska, the largest U.S. state and 49th state, has a population of 731,449 and was purchased from Russia for $7.2 million. The state is known for its natural resources, including oil and gas, and major cities such as Anchorage and Juneau, as well as attractions like the aurora borealis and extensive wildlife. It features a diverse climate and geography, with over 100 active volcanoes and significant contributions to ecotourism and industries like mining and fishing.