Biological systems continually tinker. The human brain is especially good at tinkering—at finding new uses for biological and technological developments.

The Human Brain

A brain is a central concept in animal biology because even single cell animals must process survival information about thermal, chemical, and/or light variations. More complex animals developed brains that could recognize and respond to additional environmental challenges. For example, social species need an efficient communication system that incorporates basic skills with the ability to determine content and identify appropriate recipients.