The "super outbreak" of April 26-27 alone involved more than a hundred separate twisters, killing over 300 people and cutting a path of destruction across the south. Witness: Tornado Swarm 2011 tells the story of this once in a century event, as captured by those who lived to tell about it.
The DVD-R is a non-rewriteable digital format that is compatible with most commercial DVD players. The DVD-R format is created with MPEG2 Variable Bit Rate Compression with stereo sound.
How our DVDs and DVD-Rs Differ
Customers who purchase programs in the NG DVD-R Library will receive a non-interactive, play only disc. There is no chaptering information on these DVDs, but there are chapter marks approximately every five minutes, which make it easy to fast forward through a program. The DVD-R format provides the digital video and audio quality you expect from all of our DVDs.
NOTE: The NG DVD-R titles are not closed-captioned. We apologize for any inconvenience this limitation may cause.
Based on Richard Muller's book, Physics for Future
Presidents, National Geographic investigates the science behind the dangers of a high-altitude electromagnetic pulse, or HEMP. Picture an instantaneous deathblow to the vital engines that power our society, delivered by a nuclear ...
Extend your explorations to see what wildlife roams
at night. The state- of-the-art intensifier tube provides the brightest image possible with3X magnification. In complete darkness, switch on the powerful integrated infrared illuminator. Multicoated glass optics allow a 70-foot field of view ...
National Geographic journeys to the depths of outer
space to reveal stunning, up-close images of our mysterious solar system. This 3-disc set features Inside the Milky Way, Most Powerful Stars, Stellar Storms, Hubble’s Amazing Universe, Comets, and Cosmic Fury. *Please ...