5 of the most mysterious lost technologies that could have changed the world... before mysteriously vanishing forever with their creators.
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Intro: "The Machine Thinks"
by Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
Dark5 is a curated repository of documentary knowledge featuring the darkest, strangest, weirdest, scariest and most amazing of science, science fiction, history, technology and horror. Within you'll encounter paranormal top 5 lists including the most mysterious photos that cannot be explained, mysterious creatures caught on tape, secret conspiracies, unexplained videos, aliens, UFOs and the creepiest monsters real and imagined.