Turkish said:
but why dont they look like us if we originally looked the same |
Evolution is not a progression towards humanity, if you go back far enough every living thing on Earth "looked the same". The process of evolution leads to complexity and diversity.
What you seem to be thinking is that humans are the "most evolved" lifeform on the planet... we are not, I can think of three ways of looking at it:
One way is that all current species are equally evolved because they have spent an equal amount of time evolving since their common ancestor. (or at least all complex life... some forms of life, particularly some simple life like prokaryotes may have evolved entirely seperately)
A second way is that a more evolved species has simply spent more time as that species... ie if it were possible to send an individual back in time, how far back could it go before reproduction with it's ancestors became impossible (I don't think this way makes much sense, particularly as it is ignores things like asexual reproduction).
A third way is that the most evolved form is that which has changed the most often, which is kind of the opposite of the above in a way.
Arguably the "winner" or most evolved form for the second & third ways would be something prokaryotic like bacteria. I think the first way makes most sense though because evolution is a continuous process, every current species is equally evolved.
