I have been hearing about this story for some time. I have no idea what to think. It seems to be a step above the typical fringe story so I posted here.
Paulina Zelitsky had been contracted to take ocean current temperatures at various depths for a global warming study. What stunned Paulina about the unexpected structures on the sea floor were the 90 degree angles and regular spacing of large objects one-half mile down as deep as 2200 feet.
Dr. Manuel Iturralde, Ph.D., Geologist at the National Museum of Natural History in Havana, presented a scientific paper about his examination of the side scan sonar images and videos of the stone structures referred to as megalithic because they seem to be shaped or molded.