If evolution were true, why don humans have wings or gills or something cool?
We do have a lot to show for it. We don’t have wings or gills because mutations are themselves random so not directed to a specific outcome. They are then shaped by natural selection in that those that confer advantages tend to lead to better survival and more offspring that pass the mutation on. Gills in particular would not be selected for in our current environment even if someone happened to have a mutation that moved that direction. It wouldn’t be the case though that someone would be expected to go from having evolved lungs to breathe air they would suddenly produce a child with fully formed and functional gills. Such features are the product of multiple mutations over time slowly evolving the trait with natural selection shaping it.
