Achondroplasia is one of the most common types of dwarfism. Learn about its causes, diagnosis, and treatment. Achondroplasia is one of the most common types of dwarfism.
Westward Expansion (1807-1912) The Surge West. Summary. The westward movement of the American population occurred in intermittent flurries of settlement. The first began early in the nation's history, resulting in the statehood of Vermont, Kentucky, Tennessee, and Ohio, all of which were admitted to the Union between 1791 and 1803.
By 1861, the South had seceded, clearing the way for the northern politicians to begin creating free-labor states. On this day in 1861, Congress combined pieces of Nebraska, Kansas, Utah, and New Mexico to make a large rectangle of land it designated Colorado Territory.