Originally Posted by
Darknes
Yes, lets get back on the subject here.
GeriDoc, do you have any reasonable explanations for the Cambrian Explosion that fits in the evolution theory? (this is of interest to me)
If I did, I wouldn't be here, I would be in Sweden picking up my Nobel Prize
Seriously, the so-called Cambrian Explosion is one of the major discussion points in evolutionary theory. First, it is becoming clear that the "explosion" may have been more of a prolonged "fizzle" that lasted far longer than anyone previously thought. One relatively new theory about the increased diversity of this time relates to the new field of evo-devo, and the role of gene position and dose. This means that it may be much easier to produce new forms since low-probability beneficial mutations are not needed, only movement or dose-amplification of already existing genes. Or, Gould's view that evolution goes not by gradual changes, but by sudden jumps (punctate equilibrium) might be right. Right now, the book remains open on this one. If I am being vague here, it is because the answers aren't known - that is what is fun about biology (and science in general). What a sad world this would be if all the answers were already known.