Mankind must decide how it’s going to deal with contact with extraterrestrials — and time could be running out, one expert ...

Massive interstellar object 3I/ATLAS, larger than Manhattan, shows unusual glow pattern and planetary alignment that Harvard ...

Avi Loeb suggested that NASA may have rushed to conclusions by ruling out the possibility of an artificial aircraft.

A Harvard physicist has asserted that new images of the Manhattan-sized interstellar object rocketing through our inner solar ...

Harvard astrophysicist Avi Loeb has cowritten a research paper speculating whether the comet 3I/ATLAS is in fact "hostile" ...

A cosmic visitor is stirring an earthly debate. A Harvard astrophysicist has suggested the incoming interstellar object ...

"We should put all possibilities on the table that it's a rock, a comet, or something else until we get the evidence, the ...

"The consequences, should the hypothesis turn out to be correct, could potentially be dire for humanity," said Avi Loeb.

Theoretical physicist Avi Loeb says 3I/ATLAS seems to be unusually large, doesn’t appear to have a typical comet’s tail and ...

The strange 3I/ATLAS comet that was recently discovered to be speeding through our solar system could actually be the work of ...

A Harvard astronomer explained why an unidentified object detected this summer could potentially be an alien spacecraft. Avi Loeb, the chair of the university's astronomy department, appeared Thursday ...

Instead, scientists are looking into existing spacecraft already in orbit around other planets. Harvard Professor Avi Loeb ...