On the Origin of Brains

Brains first make their appearance in the Cambrian explosion. Beware, your own brain may explode when you hear how Darwin defenders explain their origin.

Consider for a moment how complex even a simple brain is. A single neuron is very complex, lined with precision sodium channels that "fire" in sequence down an axon or dendrite. At the tip, vesicles carry complex chemical neurotransmitters across a gap, or synapse. But a single neuron is useless alone; it needs a network of other neurons to...