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Originally Posted by $5 submissions
Good point. Maybe the scientists are just focusing on MORPHOLOGICAL evolution based on fossil records as opposed to BEHAVIORAL evolution. One key example of this is that modern human beings have been around for thousands and thousands of years with little morphological change (at least enough to warrant a new human subspecies) but our CULTURAL and COMMUNICATION evolution has been quite dramatic.
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Thousands of years is not a big scale when you talk about evolution at the higher levels of the food chain, in the past. In fact there is a physical evolution going on among humans right now; people that do not develop wisdom teeth at all, and it will become more and more common.