Yes, I’ll admit it. I have trouble visualizing geologic amounts of time. Then again, you probably do too. I doubt that there are many people for whom the span of time “a hundred and thirty-five million years” makes immediate, intuitive, graspable sense. This still doesn’t make much sense for me… but at least now I have an idea of “Paleozoic,” of “Mesozoic,” of “Cenozoic,” relative to the age of the earth, via a visualization from Basin and Range, by John McPhee. This is a school read, so I copied the helpful concept into my science notebook, then figured that I’d share it on here!