aliens

Researchers are hunting for 'technosignatures' such as communications signals that may originate from alien beings

Protocols are based around scenario in which a pilot on a training or surveillance mission encounters a UFO mid-flight

Astronomers might be able to make out strange variations in the light signatures of distant planets

US military unit apologises for the tweet

From alien invasion to the end of times, people speculate the worst

Luis Elizondo was ex-chief of the $22 million 'Advanced Aerospace Threat Identification Programme'

Most believers in intelligent alien life were in Russia, trailed closely by Mexico and China

The original album is still floating in space and should be in perfect condition

Three chicks were caught on film by residents who believed they had come across extraterrestrials

Kepler mission team released a survey of 219 potential exoplanets detected by the space observatory