> Has it occurred to you that life has succeeded on the planet primarily by a fantastical luck of getting dosed with EXACTLY the right amount of radiation, carefully controlled by an atmosphere that literal took a millennia of millennia in order to develop?
Well, no. We aren't in some mystical radiation balance with nature.
Heritable point mutations are primarily driven by DNA polymerase errors and repair failures, not by radiation damage. Ultraviolet light is good at causing thymidine cross-linking, which can give rise to cancers, but this is irrelevant to heritable change. Likewise, higher energy particles can cut DNA, but compared to crossing over events during chromosomal assortment this has approximately no bearing on heritable change.
Well, no. We aren't in some mystical radiation balance with nature.
Heritable point mutations are primarily driven by DNA polymerase errors and repair failures, not by radiation damage. Ultraviolet light is good at causing thymidine cross-linking, which can give rise to cancers, but this is irrelevant to heritable change. Likewise, higher energy particles can cut DNA, but compared to crossing over events during chromosomal assortment this has approximately no bearing on heritable change.