Today, tsunamis kill thousands of people and wipe out everything in their path. Earthquakes destroy entire towns and villages, while hurricanes destroy landscapes and leave hundreds dead and thousands homeless. As long as the Earth exists, natural disasters occur. But could these catastrophes really erase all memory of our existence, including art, architecture and technology? The evidence hints that this is not only possible, but has happened from time to time. It is possible that ancient civilizations were destroyed in large natural disasters and left no trace. In recent years, scientists have found evidence of ancient, once-thriving cultures that are thousands of years older than they thought possible. But what happened to them? How did they disappear? And could it happen again?