NASA's Unexplained Files
The power of atomic bombs; artificial rings; Neil Armstrong's transmission on the moon.
The power of atomic bombs; artificial rings; Neil Armstrong's transmission on the moon.
The swirling gases of Saturn form a perfect hexagon that has hovered above the planet for 30 years.
A distant planet shows an Earth-like atmosphere; a glowing light suggests an atmosphere on the Moon.
A piece of the sun seems to have vanished; the Hubble spots an unidentified object.
Life may have been found on Mars; mysterious Moon Pigeons.
Engineers count down the final moments of a milestone in space travel.
Experts discuss the many possible ways that could spark the beginning of the end for the universe.
A team of experts investigate extra-terrestrial beings and their threat to human life.
More than 100 million pieces of small space debris are floating around the Earth.
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.
Earth is hit by 100 tons of rock from space every day; most burn up in the atmosphere.
Experts use cutting-edge astronomy to investigate mysterious alien worlds.
Gravitational waves are helping scientists explore the cosmos in revolutionary, new ways.
New discoveries reveal a supermassive black hole from the earliest days of the cosmos.
New discoveries reveal how neutrinos pass through objects undetected.
A supernova hasn't occurred in 400 years, and the search is on to locate which star may be next.
The Milky Way will face the Andromeda Galaxy in a struggle that could create a new super galaxy.
New research suggests that white dwarfs may be the key to understanding the universe itself.
New discoveries reveal how bacteria, viruses and other alien micro-organisms built life on Earth.