Nova 1974 | TV Show
PBS's premier science-documentary series, which has won six Peabody Awards and more than 20 Emmys (four in 2002 alone) since its 1974 debut. `Nova' clearly, and often engagingly, `demystifies' a vast range of science, technology and history topics---past a (more…)
Premiered: March 3, 1974
Season 40, Episode 20 Oklahoma's Deadliest Tornadoes
First Aired: May 29, 2013
Examining the May 20, 2013, tornado strike in Moore, Okla., which occurred two years after the worst tornado season on record, and whether improved radar and warning systems led to fewer deaths than in the May 22, 2011, tornado hit in Joplin, Mo. The installment also explores whether the warming atmosphere will cause more tornadoes in the future; features scientists who study extreme-weather events and storm survivors; and explains how people and communities can protect themselves.
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