https://www.extremetech.com/extreme/260272-astronomers-will-scan-interstellar-mystery-object-make-sure-not-spaceship ...."We know that ‘Oumuamua is from another solar system because it has an orbital eccentricity of 1.20, meaning it’s well past the sun’s escape velocity. Nothing that originated in...

https://en.wikipedia.org/wiki/Yakovlev_Yak-24 The Yakovlev Yak-24 (NATO reporting name Horse) was a twin-engine, tandem rotor transport helicopter developed in the USSR. In late summer 1952, the Soviet Union issued two design specifications for helicopters, with the intent of catching up to the...

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http://www.msn.com/en-us/video/nerdcore/heres-why-boeing-747s-have-a-giant-hump-in-the-front/vi-BBGAUt5 *