Animals confound us not because they are deceptively simple but because they are finally inseparable from the complexities of life. It is precisely these subtleties of fact and conception that comprise particle physics, which passes for the natural philosophy of our age. Animals move more slowly than beta particles, and through a space bewildering larger than that encompassed by a cloud of electrons, but they urge us, if we allow them, toward a consideration of the same questions about the fundamental nature of life, about the relationships that bind forms of energy into recognizable patterns.