Up Next
Back to Show
NOVA
Oklahoma's Deadliest Tornadoes Preview
On May 20, 2013, a ferocious EF5 tornado over a mile wide tore through Moore, Oklahoma, inflicting 24 deaths and obliterating entire neighborhoods. It was the third time an exceptionally violent tornado had struck the city in 14 years. Yet predicting when and where these killer storms will hit still poses a huge challenge. Why was 2011—the worst ever recorded tornado season?
Support Provided By
Unlock with PBS Passport
53:15
How courage and ingenuity saved Allied troops during the epic Dunkirk operation in 1940.
53:26
Take a mind-blowing voyage to the most powerful and mysterious objects in the universe.
Unlock with PBS Passport
54:10
Scientists uncover geologic evidence of epic floods that tore through ancient landscapes.
Unlock with PBS Passport
53:11
Experts reconstruct the Great Hurricane of 1780 to help predict the risk of future storms.
Unlock with PBS Passport
54:10
Scientists hunt for a mega-eruption that plunged medieval Earth into a deep freeze.
Unlock with PBS Passport
52:55
Engineers race to build a massive dome to contain the crumbling remains of the reactor.
1:53:34
How can the science of learning help us rethink the future of education for all children?
53:32
Watch as Otzi, a 5000-year-old mummy, is brought to life and preserved with 3D modeling.
53:07
Retrace the thought experiments that inspired his theory on the nature of reality.