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A comment on New finding: 600M years ago, a single mutation changed everything. Parent comment
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.
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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.