Killers of the Cosmos
Millions of black holes exist and some of them have the potential to be lethal to earth.
Millions of black holes exist and some of them have the potential to be lethal to earth.
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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.
Engineers count down the final moments of a milestone in space travel.
Exploring dwarf planets, home to some of the universe's biggest secrets.
Astronaut Mike Massimino uncovers the strange secrets of Earth's solar system.
Astronaut Mike Massimino explores Mercury, a deadly and tiny planet that faces constant attacks.
Journeying to Uranus and Neptune, the farthest planets from the sun.
When a massive star dies, it can direct a blast of radiation that could obliterate all life.
Millions of black holes exist and some of them have the potential to be lethal to earth.
More than 100 million pieces of small space debris are floating around the Earth.
Earth is hit by 100 tons of rock from space every day; most burn up in the atmosphere.
A team of experts investigates extra-terrestrial beings and their threat to human life.
After Neil Armstrong's moonwalk, he leads an expedition into the Amazon to find a legendary library.
A discovery by NASA's Mars Curiosity rover reveals a possible war occurred 300 million years ago.
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