How Would We Know If Intelligent Life Existed on Earth Before Humans?0
- Ancient Archeology, From Around the Web
- April 24, 2018
Reptilian menaces called Silurians evolved on Earth before humankind — at least in the “Doctor Who” rendition of the universe. But science fiction aside, how would we know if some advanced civilization existed on our home planet millions of years before brainy humans showed up?
