Astronomers believe mysterious signals - previously dismissed as 'stellar bursts' - are coming from an Earth-like planet just 22 light years away.
Spacecraft successfully arrives at 'last uncharted world of the solar system'
Unresolved cases include 1957 image by a pilot allegedly showing a UFO following a B-47 jet
Ancient text points to First Century structure where the Messiah may have lived
Ruins could be legendary lost jungle city of the Monkey God
Called Moxie it will attempt to turn the planet's carbon dioxide into oxygen
Unidentified submerged objects (USOs) are not as famous as UFOs although they are often encountered