The commonalities that we find at all of the above locations include: 1) works in stone beyond the scale and technical prowess of the historically presumed builders, such as the Inca; 2) signs of construction interruptions and/or cataclysmic damage; and 3) oral traditions speaking of much earlier civilizations with advanced technological capabilities.

The catastrophic event of 12,000 years ago, having melted much of the planet's ice and causing a global sea rise of some 350 feet, could have been so intense as to have raised global temperatures by six degrees Celsius [...]. The ending of the last ice age was not a gradual event, as most people would assume, but fast and intense.