Will Flying Cars Ever Happen?
Flying cars could come quicker than expected.
Transportation
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NASA Aims to End Ban on Supersonic Civilian Aircraft
Would you want to travel through the air faster than the speed of sound?
Hypersonic Hydrogen-Powered Jet Will Fly from America to Australia in 4 Hours
A completely hydrogen-powered flight.
Amsterdam Train Tunnel Uncovers Medieval Artifacts
An underground archeological museum.