Originally posted by galveston75
Something I've thought of about humans and if we did evolve, it would seem to me that if we are the result of all the trial and error of evolution constantly improving a species and the end result as we see it now is the human, why would we not have the best attributes of all our former subjects.
The theory of Evolution suggests that life in general is constantly evolving. There is no 'final end result'. There are only all the examples of life we see today, which could be described as 'end results so far'.
The human being is not singled out as special in any way by the theory of evolution. He is not the pinnacle of evolution or the most successful life form.
We are alive, thus we are successful so far, but so are all other life forms currently in existence.
Some I know will argue that we developed the biggest and the most complex brain. But in light of let's say a lion that could kill us with one paw, why did we not keep the strength of the gorilla, or the climbing ability of a gibbon? Or the hearing of a bat to know the lion is coming from a greater distance? That radar would really help us out at times.
You are mistaken that the above attributes are the best attributes for an organism to have. Most of them come at a cost as well as a benefit, and evolution weighs the cost against the benefits.
If we had the strength of a lion, we would need to eat far more just to support ourselves. We would also be much bigger, and not have the ability of a gibbon.
The radar probably hasn't evolved because its usefulness is so minimal as to not really confer any survival advantage. We historically generally slept at night and did not need exceptional night sight. We don't even have good night sight like many animals that do move about at night do.