What if an extra-terrestrial force attacked Earth? What might that look like and how will the people of Earth respond? Consulting a cast of world-renowned scientists, survival experts and defense experts, National Geographic explores this frightening scenario. Experts reveal what could motivate alien invaders to attack Earth, and speculate on how the attack might play out, the strategy alien invaders might use, and the most effective ways for humans to respond.
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.
When the NASA rovers Spirit and Opportunity touched
down on Mars in 2004, they weren't expected to last longperhaps 90 days, or six months at most. But 90 days stretched into five years, and a short-term science mission searching for ...
National Geographic takes you to Bowling Green, Kentucky,
where GM is developing the new Corvette Z06, a high-performance street machine that is fantastically aerodynamically efficient. This DVD Exclusive is one of the many titles in our National Geographic DVD Exclusives ...
Anyone, at any time, can fall victim to
nature's raging furies. Around the globe, hurricanes, tornadoes, and typhoons strike without mercy and often without warning. In the last century, more than half a million lives were lost to the violent ...