It was the first submarine ever to sink an enemy ship, but after only one successful mission the H.L. Hunley vanished with its crew and lay hidden for more than a century. The circumstances surrounding the disappearance of the Confederacy's secret weapon have remained an enduring mystery since the Civil War era, but now NGC has uncovered what may have brought it down.
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.
National Geographic visits unearthed Roman theaters, medieval streets,
and secret tunnels, bringing new light to Florence's lesser-known, dark history. Art detective and National Geographic Fellow Maurizio Seracini reveals history using a thermocamera to reveal long-lost architectural layers in some of ...
For the first time in history, National Geographic
and a group of scientists search the ocean floor for a series of shipwrecks many Americans never heard about. Everyone knows that on December 7, 1941, the Japanese attacked Pearl Harbor. But ...
Its name means ''city of peace.'' But as
a focal point of three major world religions, and home to some of those faiths' holiest sites, Jerusalem has witnessed 3,000 years of bloody conflict, intrigue and passion. National Geographic, with exclusive ...