What could be lost in our past?

In this video I discuss the limitations of paleontology and science and speculate what could be missing or lost to history and time. I ask a very strange question: Could there have been civilizations or cultures made by other non-human organisms?

...sorry if it seemed like I went off the deep end with this one. XD
I don't believe there were past civilizations or intelligences, it's just something I would love to be wrong about and find evidence of. All I am doing in this video is asking the question.

Hope you enjoy!

Please check out C.M. Kosemen's stuff:
Tangent Realms:
https://tangent-realms.backerkit.com/...
and
http://www.TangentRealmsMovie.com
Tumblr:
http://cmkosemen.com/about
Deviantart:
https://nemo-ramjet.deviantart.com/