USO's: Where are they?

USO stands for Unidentified Submersible Object.  They're like UFO's, only underwater.  There's been a phenomen of USO's recorded all the way back to Columbus's voyage to the new world, if not before.  Where are the USO's in modern times?  Will take a look at where these phenomena occur and some of the more famous USO cases on our next Conundrum with Cougar and Slider - this Thursday, September 4th at 5:00 PM Eastern, 4:00 PM Central and 10:00 PM UK.  Join us!