Are humans really the first civilization on this planet?

[Swampy]

It's a compelling thought experiment, and one that Adam Frank, a professor of physics and astronomy at the University of Rochester, and Gavin Schmidt, the director of the NASA Goddard Institute for Space Studies, take up in a paper published in the International Journal of Astrobiology.

I've been wondering about this, because, after tens of millions of years, there would have been no trace. But they still could have existed.

I would love to see some real research on this.

[dontom]

Apr 17, 2018 1:10:17 GMT -5 Swampy said:

It's a compelling thought experiment, and one that Adam Frank, a professor of physics and astronomy at the University of Rochester, and Gavin Schmidt, the director of the NASA Goddard Institute for Space Studies, take up in a paper published in the International Journal of Astrobiology.

I've been wondering about this, because, after tens of millions of years, there would have been no trace. But they still could have existed.

I would love to see some real research on this.

Advanced enough to not leave a trace, but not advanced enough to survive. I don't buy it.

-Don- Reno, NV

[Swampy]

No, Don, they didn't leave a trace because of the passage of time. So they were not advanced enough to "not leave a trace", and they were not advanced enough to survive.