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It's probably a comet, but it might be some sort of ancient alien spacecraft or probe. What's for sure is that the mystery surrounding an object known as 3I/ATLAS is becoming both more and ...

A YouTube video posted by the account Uncanny Expeditions appears to show a previously unseen object undergoing testing at Lockheed Martin’s Helendale Radar Cross Section (RCS) Test Range in ...

A mysterious metal object caused a stir in the Argentine province of Chaco at the end of September. The human-sized cylinder appeared in the sky as a fireball and struck a field. Experts believe it ...

A decomposed body dumped on Long Island in the 1980s has finally been identified as a long-missing 15-year-old girl whose remains were likely moved from another grave, police said Thursday. Susan Mann ...

Astronomers are still poring over data to get a better sense of 3I/ATLAS, the third interstellar object to ever have been observed careening through our solar system. The unusual visitor is set to ...

Astronomers found that interstellar object 3I/ATLAS shows an "extreme abundance ratio" of nickel and iron in its gas plume. Astronomers are still poring over data to get a better sense of 3I/ATLAS, ...

A rare visitor from beyond our solar system, comet 3I/Atlas, is poised to make a dramatic close approach to Mars this Friday, as a fleet of spacecraft trains its sights on the interstellar visitor.

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One of America’s great unsolved mysteries is the disappearance of aviation pioneer Amelia Earhart, who vanished somewhere over the Pacific Ocean while attempting to become the first woman to ...