NOVA traces 300 years of speculation, investigation and discovery that have centered on Mars-particularly the theory that the planet could support life. Questions raised by NASA's 1976 Viking mariner missions about how the vast canyons were formed are also explored.

NOVA Season 4 Episodes...

• s04e01 - Hitler's Secret Weapon
• s04e02 - The Hot Blooded Dinosaurs
• s04e03 - What Price Coal?
• s04e04 - The Sunspot Mystery
• s04e05 - The Plastic Prison
• s04e06 - Incident at Brown's Ferry
• s04e07 - Bye Bye Blackbird
• s04e08 - The Pill for the People
• s04e09 - The Gene Engineers
• s04e10 - The Human Animal
• s04e11 - The Wolf Equation
• s04e12 - The Dawn of the Solar Age
• s04e13 - The Business of Extinction
• s04e14 - The Red Planet
• s04e15 - Tongues of Men, Part 1
• s04e16 - Tongues of Man, Part 2
• s04e17 - Linus Pauling: Crusading Scientist
• s04e18 - Across the Silent Barrier
• s04e19 - The New Healers

NOVA Show Summary

Seen in more than 100 countries, NOVA is the most watched science based television series in the world and the most watched documentary series on PBS. It is also one of television's most acclaimed series, having won many major television awards, most of them many times over.