Joshua Wurman

Horizon tells amazing science stories, unravels mysteries and reveals worlds you've never seen before.

Anyone who has seen "The Wizard of Oz" knows that an oncoming tornado is nothing to trifle with, but "extreme filmmaker" Sean Casey takes viewers right into the heart of Tornado Alley and inside the storms themselves to capture valuable research data and unprecedented footage.

The tornado that struck El Reno, Oklahoma, on May 31, 2013, defined superlatives. It was the largest twister ever recorded on Earth.

Witness the awesome power and the unimaginable destruction of explosive volcanoes, ground-buckling earthquakes, and deadly tornadoes as you head into the field with scientists who risk their lives exploring the origins and behaviors of these fearsome natural disasters.

No description available.