Second hypothesis: They were build by intelligent beings

The corridor-shaped structures and geometric chambers, as well as the megaliths, do not bear a simple natural explanation. In view of this, an alternative point of view is that they were build by intelligent beings. Some Mayan traditions and those from old Yucatan cultures tell us of an antique island that vanished below sea level due to a catastrophic event near the place where their ancestors hailed from. These traditions have provided some researchers with a foundation for favoring the man-made interpretation of MEGA. However, no matter how attractive and appealing this hypothesis might be, it should not be accepted until we have direct evidences of the action of intelligent beings at MEGA site. The sonar image below exemplifies one of the most striking structures which are extremely hard to explain under natural causes.

The problems for these hypothesis are twofold: 1) According to mathematical calculations, the area of the megaliths, if it was ever emerged in the past, it must have been more than 50 000 years ago. Such a figure emerge from the present depth of MEGA (600-750 meters), and allowing a maximum rate of sinking (subsidence) of the seafloor of up to 15 mm/year. 2) Under this timeframe, no human culture is known to have developed the architectural skills to build such complicate structures.

Square structure with internal cross