[ExI] Gaian Bottleneck
johnkclark at gmail.com
Mon Feb 1 17:02:42 UTC 2016
On Mon, Feb 1, 2016 at 9:26 AM, spike <spike66 at att.net> wrote:
>…A planet that close would be gravitationally locked with one side in
>> perpetual day and the other in perpetual night; that might not be an
>> impossible burden for life but it certainly wouldn't help…
> Ja. Tide locked planets would have one small advantage for emerging
> lifeforms however: there would be a twilight ring at the transition between
> the day side and the night side. It would be a very limited strip of real
> estate, but it would have mild temperatures there always and perhaps liquid
> water, along with perpetual direct sunlight right down on the horizon.
But the twilight zone would also be subjected to ferocious winds that
never relent as the hot and cold halfs of the planet try, unsuccessfully,
to equalize their temperature; and that would probably prevent the
evolution of large plants or animals.
>> …And it's not like it would be a big deal for them to make such a
>> transmitter, for goodness sake they're capable of building a Dyson sphere!
>> Hell even we could make such a transmitter with little difficulty.
> It works the other way too: almost any civilization capable of
> transmitting signals across stellar space must be also capable of building
> a Dyson swarm or MBrain.
And we have no evidence of a
a MBrain and very little
, and that makes me think we may be alone.
> Our planet is one of the rare ones in that narrow transition, where we can
> transmit signals across the cosmos but we can’t yet build an MBrain.
We may be more than just rare we may be unique, at least in the observable
universe. The multiverse is a different matter.
John K Clark
> John you and I are among the transition people: those who recognize the
> nature of the narrow time span in which we live.
> extropy-chat mailing list
> extropy-chat at lists.extropy.org
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