Forget Atlantis—Earth Has Already Erased Whole Worlds | The Silurian Hypothesis

Could an advanced civilization have existed millions of years before us—and vanished without a trace?We follow the science behind the Silurian Hypothesis to find out what would actually remain of a technological civilization after millions of years of erosion, shifting continents, buried landscapes, and geological change. Then we turn the question toward ourselves: if humanity disappeared tomorrow, how long would it take before almost everything we built was gone?Because Earth has erased entire worlds before. The question is whether civilization was ever one of them.