Cenozoic. During the Cenozoic era mammals, like the Sabretooth Tiger, Mammoth, and Three-Toed Horses, ruled the earth.

U.S.S. Nautilus. The first crossing of the geographic North Pole by a ship was accomplished by the USS Nautilus on August 3, 1958.

It Was The Center Of The Earth. Jerusalem is a holy city for the Christian religion, as well as for Jewish and Muslim peoples.

U.S. And France. On December 20, 1803 the Louisiana Purchase was finalized, with the a total price to the United States of 15 million dollars.

Aircraft Construction. In 1927, Boeing Air Transport created the first airplane made specifically for passenger service.

Martin Luther. Martin Luther lived from 1483-1546.