Rob Whittlesey

PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and technology, and highlights the people involved in scientific pursuits.

By a stream in the woods – a place between worlds – two women find each other ankle-deep in the water, letting go of what's past and wondering what will come.

Where do dogs in all their amazing diversity come from? Tradition says that thousands of years ago someone tamed a wolf pup, thus creating the first of our best friends. But many scientists disagree. On "Dogs and More Dogs," NOVA goes to the dogs—and to leading researchers—to find out the truth. Narrated by John Lithgow, the program ranges from a wolf research facility in rural Indiana to the Westminster Dog Show in New York's Madison Square Garden. NOVA makes a fascinating detour to the city dump in Tijuana, Mexico, where viewers get surprising insight into the origin and evolutionary strategy of our canine companions.

This film explores the hypothesis that different tones of skin color in humans arose as adaptations to the intensity of ultraviolet radiation in different parts of the world.

Every year, a million babies are born worldwide with hereditary diseases. Physicians once had little to offer. But now a new breed of gene doctors is on the case. Devising treatments that target the root causes, they are transforming patients’ lives.