Featuring Michael Pollan and based on his best-selling book, this special takes viewers on an exploration of the human relationship with the plant world — seen from the plants' point of view. Narrated by Frances McDormand, the program shows how four familiar species — the apple, the tulip, marijuana and the potato — evolved to satisfy our yearnings for sweetness, beauty, intoxication.

Tells the story of the seventh century prophet who changed world history in 23 years, and continues to shapes the lives of more than 1.2 billion people. The film takes viewers not only to ancient Middle Eastern sites where Muhammad's story unfolds, but into the homes, mosques and workplaces of some of America's estimated seven million Muslim to discover the many ways in which they follow Muhammad's example.

In Defense of Food tackles a question more and more people around the world have been asking: What should I eat to be healthy? Based on award-winning journalist Michael Pollan's best-selling book, the program explores how the modern diet has been making us sick and what we can do to change it.

Determined to understand the repeating patterns he was finding in nature, French mathematician Benoit Mandelbrot used an early form of computer imagery to produce his own versions, coining the recurring shapes fractals. This installment of the PBS series "Nova" examines the rules of these self-similar patterns and explores the ways these fascinating geometric configurations can be applied in the fields of science, medicine and the arts.