Hi Bex,

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So the fact is, though they "appear" unchanged, they must have evolved anyway..... I think it's time to throw ones brain out the window and shut the eyes, irrespective of the visible evidence, in favour of "take my word for it, it happened anyway" ...
No, it is just that a lot of evolution can occur without visible differences, so not seeing any difference does not mean it does not happen. Most of what people think of in evolution are changes that result from hundreds or thousands of smaller changes, changes that are barely noticeable even to trained observers doing no more than looking at pictures. Scientists look deeper than surface appearances, because they have learned to distrust them (we can discuss convergent evolution of sugar gliders and flying squirrels if you want an example).

Enjoy.
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