While imperceptible to humans, these tiny delays are significant for experiments that rely on pulsars as ultra-precise cosmic ...

From the earliest days of human spaceflight, astronauts have described moments when something outside the window did not ...

"Close to the end of the third stage [burn], we are seeing a little more disturbance in the vehicle roll rates, and ...

The beloved show, which first aired in 1989, boasts many episodes that have gone on to echo a slew of major world events ...

Resolve to read more books in 2026—and start right here with io9’s first list of the year rounding up all the new sci-fi, fantasy, and horror titles coming your way in January. Check out new books by ...

The afternoon of 7 August 1996 isn’t a time that sticks in many people’s minds. But if things had worked out differently, it might have been etched into our collective memory. At 1.15pm, US President ...

Americans are becoming more open to the idea that aliens have visited Earth, according to a series of polls that show belief in alien visitation has been steadily on the rise since 2012. Moreover, ...

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If aliens are out there, why haven’t we heard from them? That’s the question at the center of Pop Mech’s new story, “Aliens Probably Exist—But They’re Staying Silent For a Reason, NASA Scientist ...

Steven Spielberg’s new UFO movie has reignited speculation within the alien conspiracy theory community, especially after cryptic billboards teasing the upcoming film popped up across the country this ...

As the comet heads toward its closest pass by Earth, a team led by NASA astrochemist Martin Cordiner used the Atacama Large Millimeter Array (ALMA) in Chile to study the gases streaming off its ...