Answer;
-The Mongols
-Herodotus
-Persian empire, which became the model for
pretty much all land-based empires throughout the world. Except for the Mongols.
Much of what we know about the Persians and their empire comes from an outsider writing about them and one of the first true historians was Herodotus, whose famous book The Persian Wars talks about the Persians quite a bit. Now the fact that Herodotus was a Greek is important because it introduces us to the idea of historical bias.
Basically it kept the colonies from expanding trade, and in turn kept the colony from expanding and getting new things. England saw the colonies as a threat, and did not want them to grow into another superhero in a new land.
1) Mercury; 2) Skylab; 3) Gemini; 4) Space Shuttle; 5) Apollo . The United States Agency that deals with space exploration and its programs is th NASA or National Aeronautics and Space Administration, with many successful missions, including puting the first man on the Moon (program Apollo).