[ExI] Panbiogenesis news
pharos at gmail.com
Fri Mar 6 15:21:18 UTC 2015
On 6 March 2015 at 14:29, Stuart LaForge wrote:
> About ten years ago, I discussed on this list the possibility that life
> started *everywhere* in the universe in the epoch following the big bang. My
> reasoning was that shortly after the big bang, the universe was too hot and
> dense for life, while now the universe is too cold and diffuse for life.
> Therefore it stands to reason that to get from then to now, at some point
> the universe would have had to pass through a "goldilocks epoch". During
> this time the entire universe should have had liquid water in abundance at
> about 310 K, the perfect temperature for carbon-based life. This temperature
> would be independent of stars because it would have been the background
> temperature of what is now the CMB. Thus even interstellar water nebulae
> could harbor life.
> Well now it looks like a professional astrobiologist at Harvard has caught
> onto the idea:
This paper was much discussed when originally published and the
reaction was that it was speculative, but very unlikely.
The warm period was only c. 2 million years. Not long enough to evolve life.
Lots of radiation from the early universe.
If any early solar systems existed, there would be a heavy bombardment
Lack of heavy elements generated from stellar evolution.
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