If an advanced industrial civilization had existed on Earth one hundred million years ago, a civilization with cities, roads, energy systems, and technology, would we be able to find any evidence of it today? According to two astrophysicists who explored this question in 2018, the answer is: probably not much. The Thought Experiment In 2018, Gavin Schmidt and Adam Frank published what they called the Silurian Hypothesis, a nod to the intelligent reptilian Silurians of Doctor

Piri Reis map and Oronteus Fnaeus map and link to Atlantis