NOVA explains "chaos," a new science that is making surprising sense out of chaotic phenomena in nature, from the weather to brain waves.

In an Idaho classroom, teacher Phil Gerrish puts an unorthodox interpretation on the day's biology lesson. As students take notes, he explains that creationism is a valid scientific explanation for the origin on life. Once relying solely on the literal word of the Bible to make their case, creationists now argue that the scientific evidence is on their side. NOVA reports on this new twist in the long-running battle between creationism and evolution.