Was there a higher rate of cladogenesis 2-3M years ago? Higher levels of radiation do correlate to higher rates of genetic mutation; presumably because radiati

Was there a higher rate of cladogenesis 2-3M years ago? Higher levels of radiation do correlate to higher rates of genetic mutation; presumably because radiation so affects transcription. Does the punctuated equilibrium theory model radiation level in estimating rate of evolution? Rate of evolution: https://en.wikipedia.org/wiki/Rate_of_evolution https://en.wikipedia.org/wiki/Rate_of_evolution