What on Earth?
Satellites find American stealth technology; something large is lurking beneath Loch Ness.
Satellites find American stealth technology; something large is lurking beneath Loch Ness.
A fleet of large ships stranded in the middle of a vast desert.
A look at whether the desire for gold is the result of extraterrestrial landings in the past.
New evidence and modern-day UFO sightings have experts rethinking Native American myths.
Evidence suggests contact with aliens may have influenced humankind and many of its sacred sites.
The Royal Air Force regularly encounters UFOs, but the British government denies the sightings.
The U.S. government continues to deny the existence of extraterrestrials.
Investigators reveal the secret history of U.S. presidents and UFOs.
An exploration into whether breakthroughs are the result of human efforts or contact with UFOs.
There are landmark cases of alien abduction that scholars struggle to refute.
Researchers investigate what really happened during encounters between police and UFOs.
Evidence reveals the development of Nazi weapons not long after an alleged UFO crash.
UFO sightings by pilot and astronaut experts are far more common than we're lead to believe.
Investigating whether deathbed confessions provide real evidence of the existence of UFOs.
New evidence pointing to the possibility that ancient man was visited by extraterrestrials.
From the lore and history of ancient Egypt, to the myths of Native Americans, and even the art of the Renaissance period, mankind's past is riddled with the evidence of UFOs.
The ultra top-secret military base in the remote deserts of Utah known as Area 52.
Newly declassified documents are leading UFO researchers to believe UFOs may inhabit our oceans.
Astronaut Mike Massimino journeys to the deadliest stars in the universe.
Exploring dwarf planets, home to some of the universe's biggest secrets.