A newly spotted interstellar comet is passing through our solar system at a blistering speed of 130,000 miles per hour, raising both scientific interest and speculative questions about where it came ...

A Harvard scientist has suggested a 'hostile' object coming at us on Earth is an advanced 'mothership' after a warning was ...

An unidentified flying object has been spotted hurtling towards Earth, and one expert believes it could be the first evidence of extraterrestrial intelligence.

A Harvard astronomer is suggesting that an interstellar object nearing Earth could be an engineered object — rather than a ...