[ExI] ETs/Aliens

[efc at disroot.org]

On Wed, 21 Aug 2024, BillK via extropy-chat wrote:

> On Wed, 21 Aug 2024 at 16:07, efc--- via extropy-chat
> <extropy-chat at lists.extropy.org> wrote:
>>
>> Well read people know that the solution is of course the crystal spheres.
>> Only possible to break from within, impossible to break from the outside.
>> _______________________________________________
>
>
> I am obviously not well-read enough!
> I had to look it up -
> <https://en.wikipedia.org/wiki/The_Crystal_Spheres>
>
> BillK

Yep, that's the one. I liked it. Fun, creative take on the problem. Vernor 
Vinge has another take with his zones.