The Proof Is Out There: Worm-Like UFO Spotted in the Sky (Season 4)

What is the odd, worm-like object seen in the sky in a video Tweeted by a Proof viewer? See more in this scene from Season 4, Episode 10, “Worm in the Sky, Skeletal Mystery Remains and Thessaloniki Mystery Sounds.“ all of your favorite The HISTORY Channel shows at If you are interested in submitting videos or other content to be featured on an upcoming season of The Proof Is Out There, head to to agree to our Terms and Conditions and submit your content via our Submission Page. #TheProofIsOutThere Subscribe for more from The Proof Is Out There and other great The HISTORY Channel shows: Watch more The Proof Is Out There on YouTube in this playlist: Check out exclusive The HISTORY Channel content: History Newsletter - Website - https: