The level of Earth’s Oceans have changed many times over the millennia. Global sea level rose by a total of more than 120 meters (360 feet) as the vast ice sheets of the last Ice Age melted back. This melt-back lasted from about 19,000 to about 6,000 years ago, meaning that the average rate of sea-level rise was roughly 1 meter per century. Since many early cities and civilizations were built near the coast, there must be many submerged ruins around the world we are not yet familiar with. The study of these ruins is one of the great unmapped needs for future archeology. We do know about a few of these ruins and are learning much more. This book is a summary of what we know or think we know today about these lost civilizations, cities, and towns. I’ve also included the stories of many legendary cities or locations like Atlantis and Lemuria.

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