Evolution is a one way street, devolution is a fabricated term that has no real meaning.
People get hung up on evolution because of their own arrogance, suggesting higher and lower forms, and more evolved or less evolved.
Evolution is a simple concept to grasp, (not so simple to prove admitedly) it is simply the changes that occur to a living organism in response to
We will never "devolve" back to our original primate ancestor, we may however evolve to a creature that is more similar in appearance and mental
accuity if the correct external stimuli exists.
And its quite possible to evolve into remarkably different looking creatures (dogs are the usual model here) and still be the same species.
Speciation is the point at which creatures that shared an ancestor could no longer produce viable offspring. This is another point where people get
confused about evolution.
Donkeys and horses once, possibly quite recently in evolutionary terms, shared a common, horse like ancestor. Currently horses and donkeys can
produce offspring (mule) but these are sterile and unable to reproduce. This is an example of speciation in progress, which in turn is a result of
evolution. At the point when donkeys and horse can no loger produce a mule, they will be completly different species and not merely different breeds
of the same animal. (actualy, I think they may already be classd as different species but will err on the side of cant be bothered to google it)
In conclusion. once you understand that evolution has no goal, no end game and no final solution, that it is purely the mechanism by which living
organisms survive and prosper, or fail and go extinct in any given environment, it all becomes crystal clear.
P.S. its realy quite enlightening when you realise that evey organism on the planet is exactly as evolved as you...worms, slugs, elephants and
edit on 3-1-2012 by idmonster because: Spelling