I must admit I am always a bit perplexed by the use of the terms "microevolution" and "macroevolution". Is there a difference? Some folks speak of them as though they were two entirely different processes. Isn't one just the cumulative effect of the other? If small changes can occur over the short term, isn't that a pretty good indication that multiple small changes can occur over multiple short terms? Or millions of small changes over millions of short terms? It seems to me that accepting the concept of microevolution but not macroevolution is a bit like accepting the concept of years, but not of centuries. Or, accepting that a brick thrown into a truck will add a pound of weight, while denying that 10,000 bricks in the same truck will add 10,000 pounds of weight. They are the same process, quantitatively different, but qualitatively identical, are they not?? Puzzled in Rhode Island, Paul Monfils