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This is interesting. It's possible for life to exist 10,000,000 years after the Big Bang because it's warm enough for life without stars, but then all that life would go away when starless planets would just get cold and die.
Did these planets have a light source, if not for a star?
Posted October 3rd, 2018
>but then all that life would go away when starless planets would just get cold and die.
=that's fackin depressing if you ask me! just think of all those goofy eyeless space critters all freezing to death
Edited October 3rd, 2018
=Did these planets have a light source, if not for a star?
I wouldn't think so. Light tends to mean heat, and heat would be bad. Any such life would've evolved without the need for a star. Imagine an entire planet of bioluminescent ecosystems. Obviously on such worlds the eye, if it existed at all, would not be the most important sense organ. So evolution would instead favor scent or sound probably. For that matter pigment would probably not be that common either.
The biggest problem for life during this period would be radiation. We're still dealing with a pretty damn young universe and that means a lot of big stars, big booms, and other radioactive stuff happening. Gama ray bursts would be a lot more frequent. Life bearing rouge planets would need strong ozone layers and magnetospheres.
Edited October 4th, 2018
by Louis De Pointe du Lac