Re: An Earth-size planet is careening untethered through the galaxy,

On 11/1/2020 7:27 AM, a425couple wrote:
> On 10/31/2020 10:05 PM, Dimensional Traveler wrote:
>> On 10/31/2020 9:32 PM, David Duffy wrote:
>>> In rec.arts.sf.written a425couple <[email protected]> wrote:
>>>> On 10/31/2020 2:13 PM, Kade wrote:
>>>>>> What Sci-Fi books have involved a planet
>>>>>> that is free and untethered to any sun / star?
>>>>>
>>>>> The T'aafhal Inheritance series by Doug Hoffman has a long-term war
>>>>
>>>> Do they ever explain how advanced forms of life developed
>>>> on a planet without warmth from sun/star light?
>>>>
>>>
>>> I haven't read that, but several people have considered brown dwarf life
>>> (eg _Permanence_).
>>>
>> If there can be life on a neutron star ("Dragon's Egg") then non-light 
>> dependent life should be a breeze!  :D  (Besides, there is serious 
>> current real world speculation about the possibilities of life in ice 
>> covered seas on various moons in our own star system.  Basically same 
>> as the deep sea vent colonies on Earth.  They survive without any 
>> solar energy input.)
>>
> Yes.
> I have no problems in believing there can be life
> where there is no sunlight.  Life that develops
> from warmth and energy from heat vents from tectonic
> movement.
> But, I am not seeing how any such life can become
> advanced enough to develop technology
> (for example - make metal tools).
> 
> "The floor of the deep ocean is almost devoid of life,
> because little food can be found there. But around hydrothermal
> vents, life is abundant because food is abundant. ... These vents
> are the only places on Earth where the ultimate source of energy
> for life is not sunlight but the inorganic Earth itself."
> 
> "What lives in deep sea vents?
> These specialized bacteria form the bottom of the deep hydrothermal
> vent food web, and many animals rely on their presence for survival,
> including deep-sea mussels, giant tube worms, yeti crabs, and many
>   other invertebrates and fishes."

Thermal vents occur in places other than the bottom of the oceans too....

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