UFO News3 Did another advanced species exist on Earth before humans?

[Alta Vista [Bot]]

New paper explains how we might go about looking for evidence of earlier civilizations. Our Milky Way galaxy contains tens of billions of potentially habitable planets, but we have no idea whether we’re alone. For now Earth is the only world known to harbor life, and among all the living things on our planet we assume Homo sapiens is the only species ever to have developed advanced technology. But maybe that’s assuming too much. Continue reading Did another advanced species exist on Earth before humans? at Alien UFO Sightings.

Source: http://alien-ufo-sightings.com/2018/05/ ... re-humans/