So after the thread about aliens, how about something closer to home?

[Alex]

So, could there have been a pre human civilisation on earth?

http://www.theatlantic.com/science/archive/2018/04/are-we-earths-only-civilization/557180/?utm_source=atlfb

I am going to say it is possible. Any evidence of a civilisation would be completely gone after a mere 6 million years. Wither or not it happened... well that is open for a lot of speculation.

[Trevor]

So, could there have been a pre human civilisation on earth?

http://www.theatlantic.com/science/archive/2018/04/are-we-earths-only-civilization/557180/?utm_source=atlfb

I am going to say it is possible. Any evidence of a civilisation would be completely gone after a mere 6 million years. Wither or not it happened... well that is open for a lot of speculation.

Some of those peeps were my ancestors. 

[RCMerchant]

Sure. I really think so.

And no, I don't think it was Mu. But It seems presumputious to think that we have figured out all of Earth's history.