Electromagnetic explosions... devastating climate change... mysterious diseases... all carving a deadly path across the globe. Could mankind's biggest threat come from a natural disaster--or might the cause be something more sinister--something from out of this world? This special examines our planet's complex infrastructure and life-support systems and shows how humans are vulnerable to attack from a variety of threats--be it man-made or extraterrestrial. Leading scientists, government officials, military personnel, and others explore where Earth's abundant resources, telecommunications, food and water supplies, weapons, and even the human body could be taken over by a hostile force. Are we susceptible to outside control? Could an enemy use our own planet and its natural resources as a weapon against us? If we discover we're not alone in the universe, would an alien invasion be likely?

A fascinating examination of ancient evidence of UFO visits to Earth. Includes a look at monuments of antiquity that point toward stars in the sky, and ancient texts that contain references to flying objects.

For decades, secrets have been kept from us. After years of silence and secrecy, the US government has finally revealed evidence of extra-terrestrial life which could shatter our very perception of mankind’s place in the universe. Uncover the shocking truth behind the newly revealed Pentagon UFO files as we go deeper than ever before to scrutinise every detail, with in-depth analysis from scientific and military experts. Now with military confirmation of unexplainable aerial phenomenon, the question of alien life invading Earth is becoming a foreseeable possibility. Are we alone? You decide.

All over the world there are megalithic stone structures whose construction baffles stonecutters, scientists, and archeologists.                       

A 2,000-year-old computer... a power plant inside the Great Pyramid... and a Nazi-era time machine with roots in ancient history.                      

Throughout history, there are stories of strange beings unlike anything known to exist on Earth. Could they be more than just mythology?               

Many argue that flying saucers and other extraterrestrial space ships continuously visit the earth. If that were true, what kinds of technologies would such alien spacecraft require?