... existed then between Asia and Alaska. It had never appeared when the glaciers of the last ice age were at their peak, locking up in the ice millions of cubic miles of precipitation that would normally have gone into the Ocean. The absence of this water lowered the level of the Bering sea more than 300 feet, enough to turn the ... America range from the earliest human fossil found on the continent, Los Angeles man of 21,600 BC, to the great Indian metropolis of Cahokia, Illinois, which sprawled over six square miles, contained more than a hundred ceremonial mounds and may have had as 20,...

• Word Count: 3974
• Approx Pages: 16
• Grade Level: Undergraduate

... marked one of the largest, if not the largest, land transaction in history. Indeed, this territorial acquisition nearly doubled the size of the USA- it grew by about one million square miles, from the Mississippi to the Rockies, and from the Gulf of Mexico to Canada. It came about as a result of a concern to secure free navigation on the Mississippi River, the ... ...

• Word Count: 1989
• Approx Pages: 8
• Has Bibliography
• Grade Level: Undergraduate