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Benjamin Franklin
One of the founding fatheres of the United States. He invented the lightning rod, bifocals, the Franklin stove, a carriage odometer, and the glass 'armonica'. -
The Challenger Expedition
The Challenger Expedition made many discoveries to lay the foundation of oceanography. -
SONAR
Helped subamrines navigate and communicate underwater. -
Ptolemy
A Roman citizen of Egypt. He was a mathematician, astronomer, geographer, astrologer, and poet.