@Tom Scott I am fairly sure that if we could accurately find the ancient cities that comprised the "atlantean" people would be a great thing that every person knows about in some way, but we have no real scientific information about.  <br><br>being able to map the sea floor in detail would hopefully reveal the areas where those people lived (if any evidence still exists like house foundations etc).  many greek and earlier writers talked of them as being lost when the seas rose higher, and science has said that the ocean depth has altered about 400 feet higher then in pre history for us humans, so between the land of the continental shelf that would be exposed by ocean recession and the various mountain ranges under the same area, there could be vast areas of human habitation that was right by the sea then that has been swallowed by the ocean.  so we have probable treasure troves of history and archeology right there, under the water.   <br><br>Many of our hypotheses of how prehistoric peoples traveled and migrated are only possible due to finding their remains inland, when they were possibly at their peaks or when they migrated due to the loss of their homes by the sea rising, so dates of when humans inhabited areas are sketchy at best when describing which ethnicity reached where and when, <br>Science has long stated they cannot find remains of boats tools for that etc at our current waters edge, due to the fact that the seas were so much shallower in the past.  also, hey, if we were able to solve that riddle, we could dispel the whole alien schtick that people love to throw around.