How could we defend Earth against an alien Invasion? Do we even stand a chance? Could the United States, Russia and China ...

Harvard's Avi Loeb warns interstellar comet 3I/ATLAS could be alien tech. Experts weigh in on planetary defence and the risks ...

A Harvard University astrophysicist has sparked a furious debate by warning he cannot rule out that extraterrestrials are ...

ATLAS made its long-awaited nearest approach to Earth on Friday but just hurtled past, showing that the aliens who "sent" it ...