A man spots something strange in Lake Superior. See more in this clip from The Proof Is Out there. Watch all new episodes of The Proof Is Out There on Fridays at 10/9c, and stay up to date on all of your favorite The HISTORY Channel shows at http://history.com/schedule. #TheProofIsOutThere ...

Is a strange sound traveling through 5,000 miles of ocean proof that the prehistoric Megaladon is still alive? See more in Season 1, Episode 5, "Deep Sea Sounds and Phantom Ships." #TheProofIsOutThere Watch all new episodes of The Proof Is Out There on Fridays at 10/9c, and stay up to date on ...