Nobody Has Ever Figured Out What These 5 Mysterious Sounds Are

WATCH: The 5 Most Mysterious Sounds Ever Recorded

Do you hear that?

Earlier this month, YouTuber Dark5 uploaded a video listing the five most mysterious sounds ever recorded. It covers everything from the infamous 1997 bloop to the low-frequency hums that have tormented people around the world for decades.

Though there has been much speculation about the sources of the sounds, the video claims no one can be sure who or what they are coming from.