The discovery that the sunlight reaching Earth is dimming and the implications that has for global climate change, is examined. Included: how researchers used the days after 9/11, when aircraft were grounded in the U.S., to study how plane vapor trails affect the atmosphere; and how less pollution in the atmosphere may have the unintended consequence of accelerating global warming.

NOVA Season 33 Episodes...

• s33e01 - Mystery Of The Megaflood
• s33e02 - Sinking The Supership
• s33e03 - Einstein's Big Idea
• s33e04 - Volcano Under The City
• s33e05 - Hitler's Sunken Secret
• s33e06 - Newton's Dark Secrets
• s33e07 - Storm That Drowned A City
• s33e08 - The Mummy Who Would Be King
• s33e09 - Deadly Ascent
• s33e10 - The Perfect Corpse
• s33e11 - Jewel Of The Earth
• s33e12 - The Ghost Particle
• s33e13 - Arctic Passage: Prisoners of the Ice
• s33e14 - The Great Robot Race
• s33e15 - Voyage To The Mystery Moon
• s33e16 - Dimming The Sun

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.