[Wonder Warthog]

"So now we have the “punctuated equilibria” theory, which postulates that the fossil clock fluctuates wildly (long periods of stasis punctuated by rapid periods of evolution) and a wildly fluctuating molecular clock."

These two hypotheses are NOT contradictory, and in fact tend to support one another. I would surmise that a variation in the "tick time" of the molecular/DNA clock is what controls "punctuated equilibrium".

My own take on the subject is that in times of increased stress, the rate of DNA change increases.

[ClearCase_guy]

I would surmise that a variation in the "tick time" of the molecular/DNA clock is what controls "punctuated equilibrium".

That's a good theory to have if you're interested in defending an existing theory which is apparently flawed.

On the other hand, if you want to look dispassionately at the evidence and engage in science based on that, then such "surmizing" seems contra-indicated.

[RobFromGa]

My own take on the subject is that in times of increased stress, the rate of DNA change increases

Does this explain why the Democrats are turning into head-spinning alien life forms in front of our eyes?