Location: 59:07’S 105:03’W
Depth: 3904 meters
Somewhere west of Cape Horn, Pacific Ocean, North of Antartica
Date: 29 August 1964
The NSF research vessel Eltanin took this underwater picture of an unusual object (source of image: French Wikipedia).
For years, many speculated on what kind of device (an antenna?) could it possibly be, and who planted it at such unlikely location.
The answer, only recently disclosed, is a simple one in this case: Cladorhiza Concrescens.
So, it appears the Eltanin antenna is a sponge.
For details, click here – you may find Larry Hatch’s controversial research illustrative.