The last Ice Age, which began nearly 125,000 years ago, had reached its maximum extent during the Last Glacial Maximum (LGM) around 20,000 years ago. At this time, large parts of the Northern Hemisphere were covered in kilometers thick ice caps, and the sea level was nearly 400 feet lower than it is today.[1] Large tracts of the continental shelves which are now submerged under water, used to be sea-front, real estate – perhaps supporting many thriving, maritime, Ice Age civilizations. Not only were the existing islands much larger back then, but many new islands were exposed in the seas, which were connected to each other and to the mainland by land bridges, forming vast antediluvian landmasses.