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No, he recognised that species evolve into new species.
evolve
When things evolve, the whole species doesn't change. Theres one member of the species that is born different (slightly) and if it does well then it passes on its genes. The old species doesn't go away unless for some reason it stops doing well and dies out (by "doing well" I mean finding enough food and reproducing.) So to answer your question in a more straight forward way, they DID evolve because they aren't the same as prehistoric apes. They just didn't evolve in the same way we did.
If its environment merited them to need short legs or short legs made them survive longer, then a species would evolve short legs.
They evolve and adapt so they have traits hat are useful to them, by Natural selection. This means that members of a species that are isolated, well, natural selection makes those with the best chances for survival mate with each other and produce offspring with that trait.
Charles Darwin was the man who produced the theory of evolution, which describes how species of organisms, by a process of natural selection, gradually evolve into other species.
Populations evolve.
Obviously, since both species are mammals.
This describes the process of evolution. When organisms evolve, they change over time in a way adaptive to their current environment.
Flies will likely continue to evolve for another 1.1 billion years before extinction. The current species will have gone extinct (replaced with a new species of Fly) long before then.
Modern evolutionary synthesis represents the current scientific consensus on how the genome of living organisms change, allowing them to evolve in response to their environment.
Mushrooms do not have legs so they can't move.
Scientists currently think that the evolutionary process is ongoing. Species that cannot adapt do not survive; those that can change and evolve are more successful.
Not only can aliens evolve into different species but they can make us into a new species but they may only do that with the correct technology. So the question is how will they do it and how much time will they have?
Species evolve gradually.
Evolve
evolution.