The Chinese burned and destroyed their own history.
The Spanish burned and destroyed how many ancient cultures testimonies?
The destruction of the Library of Alexandria.
Its destruction a second time by some Muslim Lunatic leader.
With side scan Sonar..and sounding technology...I believe they will find habitations below the ocean..and who knows..some decipherable record that will rock mankinds thinking.
Lets hope there is something burried out there....cuz it looks like the Lunatics destroyed most of our history allready.