After Neil Armstrong's moonwalk, he led an expedition into the Amazon to find a legendary library that holds all knowledge of an advanced alien civilization. Experts ask if a close encounter on the moon's surface inspired Armstrong's mysterious quest.
A strange discovery by NASA's Mars Curiosity rover suggests the Red Planet was home to an alien nuclear war 300 million years ago, and experts investigate if an extraterrestrial Armageddon transformed an earth-like world into the wasteland we know today.
When NASA begins a strange experiment to communicate with dolphins, experts investigate if it's a prelude to making alien contact. Some fear, however, that such a discovery could have apocalyptic consequences.
When NASA discovers something strange on Saturn's biggest moon, experts investigate if aliens feeding on the world's electric atmosphere could be the culprit. The disturbing evidence points to a grisly apocalypse if these monsters ever make it to Earth.