Are we at some kind of evolutionary equipoise as a species? Or, are we destined to become something different - something, perhaps, even better adapted to the environment?

At the bottom of the ocean, bacteria that are thermophilic and can survive at the steam vent heat that would otherwise produce, if fish were there, sous-vide cooked fish, nevertheless, have managed to make that a hospitable environment for them.

Keep in mind that there are many neurotoxins in the world. Dozens of natural and industrial substances have neurotoxic properties.

We've gone from a preponderance of acute and infectious disease as a source of premature death to chronic diseases, which are the preponderance of the burden of illness in most of the world. That puts a much higher premium on the prevention of chronic disease than ever in history.

The flu is very unpredictable when it begins and in how it takes off.

Autism is a complicated illness, and children with a variety of treatments and non-treatments show improvement over time, which is all to the good.