Ancient aliens is nothing more then sensationalist tv meant to get easily mind-fucked people to watch advertisements.
The show is clearly silly and makes wild claims with no substantial content..
For example, I caught a few minutes of an episode yesterday about time travel, and in it they make this retarded claim and then go on to consider it a done deal fact.
They show the Large Hadron Collider's detector array, saying "look, it looks like circles!" (but only from one angle, of course), and look, these ancient mandala paintings are also a bunch of circles! this means the ancient aliens had LHC technology and this means they could time travel, which means they could cross inter-stellar distances in the blink of an eye!
What stupid nonsense. Anyone who doesn't see the serious flaws in that line of very very very circumstantial evidence needs to stop watching TV completely, and work on elevating your mind above the level of a salamander!