For centuries, humans have experimented with flight in the form of large kites, hot-air balloons, gliders and, eventually, airplanes. Personally, I’ve taken many plane trips, tried hang-gliding and ...
Add Yahoo as a preferred source to see more of our stories on Google. ORLANDO, Fla. — For centuries, humans have experimented with flight in the form of large kites, hot-air balloons, gliders and, ...
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