louisiana purchase ducksters.com Category:history Global Rank:88,594 visits:715.5K pages/Per:2.1 check123.com check123 is the web's first video encyclopedia. come and learn about arts, history, science, space, animals and more in 1, 2, or 3 minute videos!! Category:news and media Global Rank:2,784,169 visits:17.2K pages/Per:1.1 ADS