[muir_redwoods]

Evolution is driven by environmental stressors. No stress, very little change.

[Blood of Tyrants]

Except that there have been dozens of ice ages and warming periods bringing hot and cold, dry and wet climates. Deserts become rain forests and rain forests become deserts. Pests and diseases come and go. Don’t try to convince me that the environment hasn’t changed in 2 million years where they are.