EUTOPIA
SCIENTIST CLAIMS: ANCIENT ‘TECHNOLOGICAL SPECIES’ MAY HAVE LIVED ON EARTH—BEFORE HUMANS
The researcher notes that on Earth, erosion, and plate tectonics may have erased any evidence if such—ancient Alien—species ever lived on our planet millions, or perhaps billions of years ago. Extraterrestrial technosignatures might be expected to be extremely old, limiting the places they might still be found to beneath the surfaces of Mars and the Moon, or in the outer Solar System.