Re: Kardeshev is pre-Spike thinking

From: eugene.leitl (
Date: Wed Jun 07 2000 - 22:17:52 MDT

On Wed, 7 Jun 2000, Adrian Tymes wrote:

> And this would be impossible because...? Last I heard, the universe

Impossible, no.

> itself (15 billion years old) was only about 3x older than Earth itself
> (5 billion years). If we're on the fast side of planet formation->
> technical civilization, and planets capable of sustaining life (and
> which would hang around long enough for technical civilization to come
> around) did not start to form until the universe was about 10 billion
> years old...

Observable, no. If we have semisynchonous/delayed hatching, we're not in
their lightcone, nor they are in ours (and, in ours, there is not much to
see yet, anyway).

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