Could there be another advanced civilization underneath our feet? 1

Could there be another advanced civilization underneath our feet?

If creatures exist under the surface of our planet, they would not reside in volcanic rock, but rather in advanced spacecraft that are capable of generating the necessary conditions for life to survive. Are tectonic plate changes a result of their actions, or are they a natural feature of the Earth?

Humans in California 130,000 years ago? 3

Humans in California 130,000 years ago?

The evidence came from a collection of mastodon bones and ancient stones dating back to around 130,000 years ago, which appeared to have been hammered and scraped by early humans.