Likewise, Carol Delaney, a cultural anthropologist at Stanford University, concludes that Columbus was a deeply religious man whose purpose was to sail to Asia to obtain gold in order to finance a crusade to take back Jerusalem and rebuild the Jews' holy Temple.

CNN: Was Columbus secretly a Jew?

The key was not to try to dig a Suez-type of canal, a great sea-level trench from ocean to ocean, but to create a lock-and-lake canal, where the ships are lifted up by a series of locks to a man-made lake, and then they sail across that lake, and then they are set back down on the other side by another series of locks.

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