Advanced civilizations may have existed on Earth long before humans. The “Silurian hypothesis” suggests industrial life could have thrived and vanished millions of years ago. Since humans have only been industrial for 300 years, could life have reached similar heights before?
Advanced civilizations may have existed on Earth long before humans. The “Silurian hypothesis” suggests industrial life could have thrived and vanished millions of years ago. Since humans have only been industrial for 300 years, could life have reached similar heights before?
