Do you believe that there's life on Mars? See more in this compilation from Ancient Aliens. 00:00 - Signs of Lost Civilization Found on Mars 03:13 - Were Mythical Fallen Angels Actually Martians? 07:02 - Humankind's RETURN to Mars 11:34 - The Mars Monolith Watch your favorite episodes of ...

Tens of thousands of individuals go missing every year and many are never found. But this is not a new phenomenon. See more in this scene from Season 1, Episode 10, "Gone Without a Trace." Watch your favorite episodes of Ancient Aliens on The HISTORY Channel website at ...