Was There a Civilization On Earth Before Humans?

(Atlantic Science) – Adam Frank:

It only took five minutes for Gavin Schmidt to out-speculate me.

Schmidt is the director of NASA’s Goddard Institute for Space Studies (a.k.a. GISS), a world-class climate-science facility. One day last year, I came to GISS with a far-out proposal. In my work as an astrophysicist, I’d begun researching global warming from an “astrobiological perspective.” That meant asking whether any industrial civilization that rises on any planet will, through their own activity, trigger their own version of a climate shift. I was visiting GISS that day hoping to gain some climate science insights and, perhaps, collaborators. That’s how I ended up in Gavin’s office.

Just as I was revving up my pitch, Gavin stopped me in my tracks.

“Wait a second,” he said. “How do you know we’re the only time there’s been a civilization on our own planet?” …

theatlantic 2018/04 civilization

Silurians

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