...Hate to break it to you, but that characterization of 'macroevolution' is hardly what the term means. Quite literally, by scientific standards macroevolution is the accumulation of microevolutionary changes over many generations. Personally, I think the old paintbucket analogy works very well for this, but I think this image works just as well.Ragsnstitches said:I say that Macroevolution is "theoreitcally" possible in regards to huge change which could happen without the need for long periods of time and many minute mutations... it's just highly unlikely. This is coming from the original comments line about frogs growing 7 legs as result of exposure to a toxic environment. While in that case the frogs are liable to die off, it is very much possible, though highly improbable, that such a significant change in a short space of time could be ultimately beneficial. Heck, plants have been used to observe speciation in a single generation, which means that Macroevolution can happen, though I haven't found records of how successful these knew species are over their parent species which makes it difficult to class as an evolutionary leap... just a drastic mutation.

To reinterate what the image said, every minute change in color could be considered a microevolutionary change, whereas the process of changing from red to purple and then purple to blue (or red to blue, if you prefer) is best equated to macroevolution.
What you refer to is closer to 'punctuated equilibrium' than macroevolution, but even then the timescale seems...well, hollywood-esque for most intents and purposes.