Vipers have been evolving their way toward the top of the reptile heap for millions of years. Armed with an amazing arsenal of deadly tools, vipers have proven to be remarkably successful predators. Sharpened by millennia of natural selection, vipers have used these traits to penetrate almost every continent on the globe. But in an ever-changing world where skills new and old are constantly put to test, how will these reptiles find new evolutionary paths in which to continue to advance?
Not available for shipment outside of the U.S. and Canada.
For the first time ever, National Geographic presents its programming in DVD-R format. Available exclusively through this site, you can now own more of our award-winning specials and documentaries in a high-quality DVD format.
How our DVDs and DVD-Rs Differ
Customers who purchase programs in the NG DVD Exclusives 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 Exclusives titles are not closed-captioned. We apologize for any inconvenience this limitation may cause.