Humans have wondered for centuries whether we are alone in the universe — and a new study suggests that if alien ...

For decades, scientists have been actively searching for signs of extraterrestrial life. Fromradio waves to laser flashes and infrared heat signatures, the hunt for alien technosignatures has ...

The interstellar object 3I/ATLAS, captured by the James Webb Space Telescope, shows what astronomers see as an unusual chemical composition as it nears the Sun. NASA says it behaves like a comet, ...