Mankind must decide how it’s going to deal with contact with extraterrestrials — and time could be running out, one expert warned — after he sounded the alarm that an incoming ...

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

A cosmic visitor is stirring up an earthly debate. A Harvard University astrophysicist has suggested the incoming ...

A new interstellar object in the solar system should be investigated for the possibility that it's an alien craft, according ...

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

A senior Harvard astronomer has reignited speculation about the origins of a vast interstellar object hurtling through the ...

Scientists estimate the object to be more than 12-miles-wide, speeding at 37 miles-per-second, relative to the sun.

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

NASA's Hubble Space Telescope got an up-close look at a headline-grabbing object known as 3I/ATLAS that has wandered into Earth's cosmic neighborhood.

Harvard astrophysicist Avi Loeb suggests a comet passing through the solar system may be an alien spacecraft, sparking debate among experts.