i always wondered........dolphins and elephants have BIGGER sized brains than humans, so what has held them back? Humans have opposable thumbs and obviously, dolphins and elephants do NOT. I wonder how smart they could be if they had opposable thumbs. Also, it is a shame that elephants get hunted for ivory by poachers. For that matter, how smart would dog / wolves be with opposable thumbs. Or even raccoons? Perhaps these specie are also evolving? Just some food for thought.[/QUOTE]
Be it random, or by supreme design we all continue to evolve. There is one species I studied that seems to have a built in kill switch to evolving; the shrimp. (This was a long time ago, when I had the time to have such discussions over beer and pizza on York till all hours of the night).
The shrimps brain is located next to its airway. Should it grow, it will cut off oxygen. This may have been something I came up with to explain why there are different rates of evolution between species, or it may be factual.
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