Ancient “Technological Species” may have lived on Earth before humans

A prior indigenous technological species might have arisen on ancient Earth or another body, such as a pre-greenhouse Venus or ancient Mars. 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. One of the most asked questions on planet Earth is without a doubt: Are we the…