aliens

'We're calling them objects, not balloons, for a reason,' says VanHerck

Have not seen anything to date that would suggest there has been an alien visitation, says undersecretary of defence

SETI’s senior astronomer Dr Seth Shostak explains how the search for extra-terrestrial intelligence actually works

Mysterious flying objects may pose a challenge to US national security, says unclassified report

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'