A decade after a mysterious crater appeared in Siberia’s frozen ground, a team of Russian scientists braved subzero ...

Harvard astronomer Avi Loeb says interstellar object 3I/ATLAS could be firing its "thrusters" to leave the solar system.

Astronomers have detected a mysterious cosmic 'heartbeat' repeating every 22 minutes, unlike any known celestial object.

Tens of thousands of mysterious underwater objects, dubbed Unidentified Submersible Objects (USOs), have been logged near US ...

New research suggests that the holes were the site of an ancient marketplace, and Inca rulers may have used them as a ...

Viral video of the 3I/ATLAS interstellar comet has reignited alien theories online, but scientists confirm the object’s ...

Astronomers revisiting 1950s Palomar Observatory sky photos found mysterious flashes—bright spots appearing in one frame and ...

A popular UFO-reporting app has been making waves after reportedly recording tens of thousands of mysterious underwater objects up and down the United States’ coastlines, raising eyebrows and leaving ...

In a warehouse more than 1,500 kilometers (900 miles) from Ukraine’s capital, workers in northern Denmark painstakingly piece together anti-drone devices. Some of the ...

In a warehouse more than 1,500 kilometers (900 miles) from Ukraine's capital, workers in northern Denmark painstakingly piece ...

Harvard astronomer Avi Loeb suggests the interstellar object 3I/ATLAS could be an alien spacecraft, using thrusters to accelerate its exit from our solar system.

Scientists discover hidden cavities inside Egypt’s Menkaure Pyramid, fuelling theories of a secret 4,500-year-old entrance.