It is actually Joliet and Marquette... (get it right the first time Wiki)
The Northwest Passage is the name that European explorers gave to a theoretical waterway that would pass through the Americas and connect the Atlantic to the Pacific Oceans. However, there is no "Northwest Passage." However, the Pacific is directly connected to the Atlantic between South America and Antarctica, as well as through the Strait of Magellan. Today, however, ships often travel between the Atlantic and Pacific Oceans via the Panama Canal, a man-made waterway across the nation of Panama in Central America.
The Panama Canal
YES.
canal
The Mayans are located across Central America and certain parts of Mexico.
the canal was needed for America's self-defense
The Spanish Empire qualifies as such.
scientists know that the people fannd out the north and south into mexico and central america
A canal
In deserts across the U.S.A., Africa, Middle East, and Central America
Do you mean, at the narrowest point? It's about 20 miles.