The Pentagon released a new tranche of UFO files on Friday (May 8). Among the documents are nearly 30 videos, which feature a range of intriguing objects.
Earth is dotted with many humongous, human-made structures. To an alien eye, they may be tell-tale signs of intelligent goings-on, betraying our existence and hinting at our capabilities.
How would people react if an alien civilization actually made contact with us? Space.com talked to experts, who shared a variety of opinions about a possible real-life "disclosure day."
A civilization capable of interstellar travel may also be one that has moved beyond conquest, excess and ecological self-destruction — and it therefore may not want to talk to us.
Exomoons orbiting rogue planets could host liquid water for billions of years, offering potential habitats for life deep in interstellar space.
We may be missing alien radio signals because they have become smeared beyond the narrowband detectors that SETI utilizes, a new study suggests.
"Life might actually survive being ejected from one planet and moving to another."
Tests conducted with tardigrades suggest that there is something in Martian dirt that dramatically reduces biological activity.
President Donald Trump has issued a statement that he will instruct the federal government to begin releasing all of its files related to UFOs.
Life on Earth may exist thanks to an incredible stroke of luck — a chemical sweet spot that most planets miss during their formation but ours managed to hit.
