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> Since they do not have any evolutionary advantage, they cannot spread in the population. I think it's more the case that things may spread if they don't have
by mgkimsal 11y ago
> Since they do not have any evolutionary advantage, they cannot spread in the population.
I think it's more the case that things may spread if they don't have any disadvantage (like causing death).
- aaron695 11y agoThis goes against evolution theory. In evolution theory things that do not have any evolutionary advantage neither spread or die off. But in practice everything comes at a cost, so generally they will die off. It cost calories to create feathers, so if not useful they will disappear.