...Darwin termed the process gradualism, a theory that invokes the slow accumulation of small evolutionary changes over a large period of time, as a result of the pressures of natural selection. What Arnold and Parker found is almost a textbook example of gradualism at work.
We've literally seen hundreds of speciation events," syas Arnold. "This allows us to check for patterns, to determine what exactly is going on. We can quickly tell whether something is a recurring phenomenon--a pattern--or whether it's just an anomally. This way, we cannot only look for the same things that have been observed in living organisms, but we can see just how often these things really happen in the environment over an enormous period of time...
...Transitional forms between species are readily apparent, making it relatively easy to track ancestor species to their descendents. In short, the finding upholds Darwin's lifelong conviction that "nature does not proceed in leaps," but rather is a system prepetually unfolding in extreme slow motion..."
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