Scientists' efforts to identify and understand neutrinos, unseen building blocks of the universe, are chronicled, beginning in 1930 with Austrian physicist Wolfgang Pauli's observations about a decaying radioactive atomic nucleus. Included are comments from astrophysicist John Bahcall, who calculated the sun's theoretical neutrino output during the 1960s; and Nobel Prize winner Raymond Davis Jr., who built a neutrino trap in a South Dakota gold mine.

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.