We assume that aliens would be peaceful, but what if we contacted a civilization that wanted to colonize Earth ?
Sociologist Barry Markovsky explores why it is not unusual for people to equate the term 'UFO' with 'alien'.
A planetary scientist takes a closer look at Loeb's discovery of 'anomalous' spherules and what they could be.
The Harvard astronomer seems more convinced than ever that he has found evidence of alien technology on the sea floor.
Daniel Riedel believes that he should have taken his father's stories about being abducted by aliens more seriously.
Astronomers believe that there is a small chance that a rogue planet could have been 'captured' by the Sun's gravity.
SETI astronomers are looking for signs of extraterrestrial communications within the vicinity of a large stellar explosion.
Loeb and his team have been searching for the debris of an interstellar meteor that they suspect may be alien in origin.
Recent alien spacecraft allegations suggest that the Pentagon has actually approved conspiracy theories - about itself.
The bizarre encounter saw the terrified family call 911 to report alleged 'non-human beings' outside their home.
Government officials will look more closely at claims of 'non-human vehicles' by whistleblower David Charles Grusch.
An encounter with alleged extraterrestrial visitors drew extensive media attention in England back in 1980.
Astronomers looking for signs of alien life are listening out for radio pulses originating from the center of the Milky Way.
A spate of mysterious sheep deaths in the Welsh Cambrian mountains has been attributed to extraterrestrial visitors.
Pathologist Dr. Garry Nolan remains adamant that aliens have not only been to Earth already, but that they are still here.
Astrophysicist Michael Garrett takes a look at what inquisitive aliens might be able to find out by observing our planet.
A strand of hair found on a fence following a sheep attack suggests that there are large predatory cats prowling the countryside.
A new study has aimed to determine whether Earth's radio and mobile tower signals could be picked up from other worlds.
The US journalist and UFO investigator spent time in Soviet Russia to investigate its remote viewing experiments.
A response to signals sent by some of our own spacecraft could reach Earth before the decade is out, scientists say.