He points to a fact that reshapes how we think about lost civilizations: the coastlines of the Ice Age are now 400 feet underwater. During the Last Glacial Maximum, sea levels were dramatically lower, and the most habitable places on Earth would have been coastal zones with access to marine resources and milder climates. If advanced settlements existed 14,000 years ago, they would have been built where port cities still thrive today, along shorelines that are now deep beneath the ocean. He argues that the future of archaeology lies in marine exploration, not because of speculation, but because that's where the evidence would logically be. The drowned continental shelves hold the key to understanding what was lost when the ice melted and the seas rose.