National Geographic: Alien Invasion
You can now watch the entire National Geographic: Alien Invasion movie online in high-definition quality, complete with English subtitles for a better viewing experience. Best of all, there’s no need to download anything—simply stream it directly from your device anytime, anywhere.
Weapon designers, military strategists and biologists reveal why it's crucial they prepare for an alien attack, and the plans they have drawn up for how humans would fight back