I don't know about traits, but I had a cool thought: If we were to start colonizing other solar systems, there could be many new species evolving from us, each one adapting to its environment (over however many millions of years that kind of thing would take). These isolated civilisations would eventually forget their origins, seeing each other as aliens if they were to ever meet, not realising they share a common ancestor.
ofc; no population's entire gene pool remains stagnant. even animals that are colloquially considered "living fossils" like horseshoe crabs and crocodiles have changed tremendously over a few hundred million years. modern Homo sapiens are still very new so there is a LOT of potential for change.
maybe you've heard of this but in basic evolutionary biology we teach students about the Hardy-Weinberg model of genetic equilibrium. it states that for any given allele (a form of a gene), we can expect that the frequency of that allele to not change in the absence of various evolutionary influences (random mating, no selective advantage/disadvantage of the allele, an infinitely large population size, no mutation of the gene, and no migration of genes in or out of the population). no human population is immune from all of those influences, so over time, allele frequencies will change. some more than others.
I don't really know which particular traits will be emphasized/de-emphasized. I saw this one pop science article that said future humans would have really big eyes, but I don't know about that
Most stuff will happen within. The spirit will evolve and not so much the vehicle.
When climate change keeps it pace we might evolve into sea creatures again.
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