Submerged land discovered: habitat for half a million people. Sunken land may have hosted up to 500,000 people.
Ice melting around 14,500 years ago caused land masses to slowly sink. The result is remarkable: an area of 400,000 square kilometers that was once habitable now lies beneath the waters of the Indian Ocean. In addition to an inland sea, there was a freshwater lake and rivers, cliffs and ravines - all ideal habitats for a significant number of people.