They left the door open for alien involvement.
Strangely, there appears to be a pillar holding up the 200-foot-wide object, Lindberg said
Read more: http://www.upi.com/Science_News/2012/06/18/Undersea-object-probably-not-a-UFO/UPI-54761340064847/#ixzz1yS6MgRYk
Sounds like an ancient drive thru for burgers where you could sit under the 200 foot umbrella.