It's been a hot summer for news of what (or whom) we might one day encounter in outer space — and Josh Gates will join the conversation this fall with Expedition Unknown: Hunt for Extraterrestrials.
They don't always come in peace, but they often come in outstanding outfits.
What really happened in Roswell in 1947? Here’s what you need to know about the UFO myths and alleged cover-ups.
From flying saucers over Washington to a WWII battle in Los Angeles, we count down five of the most famous UFO sightings in history outside of Roswell.