Researchers suggest the potential for a sophisticated alien civilization present on Earth earlier than people, difficult the notion that humanity is the planet’s first civilization.
The Silurian Speculation means that proof of historic superior civilizations could also be buried beneath geological layers, making detection tough with present strategies.
Astrophysicists Adam Frank and Gavin Schmidt spotlight the potential for fossil carbon from the Carboniferous Interval to point the existence of an industrial civilization hundreds of thousands of years in the past.
Important world temperature will increase, such because the Paleocene–Eocene Thermal Most, might counsel the impression of a sophisticated civilization’s actions on Earth’s local weather.
Historic mass extinction occasions could have eradicated superior species and their civilizations, leaving little to no hint behind.
The Historical Astronaut Speculation posits that aliens could have influenced early human civilizations, with examples together with the Indus Valley Civilization and historic Egypt.
The Antikythera Mechanism, an historic analog pc found in a shipwreck, stays a thriller relating to its origin and creators, elevating questions on superior technological data in antiquity.
