The LHS 1903 system defies expectations with a rocky outer planet, prompting new ideas about how planets form and evolve.

An interstellar comet changed its chemistry after passing the Sun, revealing hidden layers and a surprising mix of carbon ...

If forced to choose one descriptor for the octopus, the best word may be “otherworldly.” These truly amazing marine animals ...

The president in February directed the Department of Defense to begin reviewing government files related to extraterrestrial ...

Trump said the Pentagon review of UFO-related documents found 'many very interesting' records that would be released 'very, ...

President Donald Trump said on Friday that his administration’s review of UFO-related ​material uncovered a number of ...

Aristotle's views on the nature of the cosmos dominated the Ancient Greek world. He argued that there's only one world, at ...

Donald Trump announced his administration would begin identifying and releasing UFO-related information earlier this year.

I thought about the interstellar visitor as my daughter, wife, and I took turns dragging his wandering monster truck balloon ...

The subject of UFOs and aliens is vast and complex, making it impossible to summarize in one article. Flying saucers/UFOs made headline news throughout the world in 1947, sparked by two major, highly ...

Representative Tim Burchett said he is "sick of hearing" that Americans can't handle more transparency about UFOs.

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.