It genuinely bothers me that more people don't understand this. There seems to be a belief amongst the masses that evolution is geared toward some sort of concious decision making process that has the ability to read the future, and create things based on some possible future need. Likewise, there is a similar belief that just because some body part evolved into its current form, it's necessarily "superior" to some other option, ignoring the being as a whole, and the concept of being old/functional enough to reproduce, and then being evolutionarily useless after that point. Evolution is not "smart". It is merely random, circumstantial, and very basic in its requirements.