Strange flying objects have been caught on NASA's cameras and astronauts have reported seeing UFOs. Some of the odd shapes and lights can be identified; others remain a mystery. We'll reveal NASA footage and interview the astronauts and scientists.
An astronauts space walk is disrupted by bright light; a flying saucer is photographed
Life may have been found on Mars; mysterious Moon Pigeons
A piece of the sun seems to have vanished; the Hubble spot unidentified object traveling faster than light
A distant planet with an atmosphere like Earth