This documentary explores the top 10 Alien encounters
Many artifacts were discovered across the world, which indicate that advanced ancient civilizations existed at some point.
Mystery has surrounded these epic structures for centuries with theories varying from the scientific to the bizarre.
Pictures taken by the NASA Mars Curiosity Rover show what could be the fossilized bones of a long-dead Martian pre-historic beast.
Two physicists have put forward a radical new model which suggests the Big Bang didn’t take place – and that our universe has no beginning and no end.
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