Tornadoes: A Spotters Guide
25:47
El Reno: Lessons From the Most Dangerous Tornado in Storm Observing History
11:00
Topics in Advanced Spotter Training - Severe Storm Ingredients
56:23
Basic Skywarn Spotter Class - Part 2 Storm Spotting and Reporting
30:25
The Anatomy of the Life of a Supercell
1:06:00
How Hoover Dam Works
16:52
Dentro do Coliseu: Mecanismos Ocultos da Roma Antiga
13:59
O Grande Engano Sobre a Eletricidade
33:39