In the U.S. alone, tornadoes kill up to 70 people a year and injure as many as 1,500 while causing an estimated 400 million dollars in damage. More than ever before, scientists are determined to unlock the mystery of how tornadoes work, especially close to the ground where they wreak the most havoc. But no one has ever been able to get a view from inside the whirling base of a deadly funnel-until now. This program takes viewers into the vortex of a tornado as researchers attempt to decipher its patterns and internal forces.

Encoded with permission for digital streaming by Infobase on Feb. 23, 2010. Learn360 is distributed by Infobase for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.

Tornado Destruction from Winds (1:37) -- Monster Tornado (1:15) -- Storm Chaser (1:04) -- Camera Probe in Tornado's Path (1:02) -- Tornado Probes (0:57) -- Tornado: Beauty and Destruction (1:04) -- Deadliest Tornado (1:14) -- High-Speed Tornado Winds (0:58) -- Tornado Wind Speeds (1:01) -- Physics of Tornado Damage (0:56) -- Video Probe to See Eye of Storm (1:04) -- Twister Path of Destruction (1:00) -- Tornado on Live Television (1:00) -- Tornado Destruction and Injury (1:01) -- Wind Force (1:09) -- Tornado Victim (1:18) -- Debris-Impact Specialist (1:38) -- Debris Damage (1:04) -- Wood Projectiles (1:21) -- Camera Probe to Film Eye of Storm (1:02) -- Ideal Twister Conditions (1:02) -- In Search of a Twister (1:11) -- Urban Tornado (1:00) -- Hero Saves Workers from Tornado (1:13) -- Tornado Destroys Office Building (1:10) -- Dangerous Tornado Debris (1:06) -- Miraculous Escape from Tornado (1:11) -- Destructive Force of Tornado (0:59) -- Tornadoes and Technology: When Will Dallas Be Hit? (1:33) -- Tornado Formation (1:00) -- Golf-Ball Sized Hail (1:23) -- Storm Tracker (1:13) -- Tornado: Near Miss (1:01) -- Two Tornadoes at Once (1:03) -- Dangerous Tornado Winds (1:17) -- Disappearance of a Tornado (1:02) -- In Search of a Tornado (1:05) -- Powerful Tornado Winds (1:02) -- Cameras in Path of Tornado (1:00) -- Video of Tornado (1:19) -- Inside a Tornado (1:12) -- Tornado: Up Close and Personal (1:14) -- Tornado Debris Field (1:05) -- Speed of Tornado Debris (1:56).