Many have believed (and many still do believe) that Darwin drove teleology out of biology forever.
The unique powers of cells — their “demonic catalytic powers” — and their fitness to play their unique role as the building blocks of all life are a wonder.
The unique fitness of nature for carbon-based life and intelligent beings of our biology is an empirical discovery.
Surely there could not be an equivalent ensemble of fitness in nature for some other type of life.
Consideration of the basic characteristics of nerve impulse propagation suggests that the speed of conduction in mammals is close to the maximum possible.