With 3I/ATLAS streaking away from our planet, speculation remains as to whether the interstellar comet is alien or not.

From mudstones on Mars to strange gases in exoplanet atmospheres, tentative evidence for extraterrestrial life is starting to ...

From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Mars. From forming black holes to phantom dark energy, discover the cosmic mysteries astronomers uncovered last year.

Astronomers thought they had seen the "first hints of life on an alien world" this year, but they disappeared under closer ...

For decades, the search for life beyond Earth has focused on distant exoplanets and the rusty plains of Mars. Now, a small ...

We've all grown up dreaming of aliens landing on the Earth or laser beaming across the sky; well, either way, it's sci-fi and ...

Polling shows that nearly half of Americans now believe aliens have visited this planet—and that the number who aren't sure ...

Scientists suggest the first alien signal we detect could be a desperate cry for help from a fading civilization.

Data from the James Webb Space Telescope on exoplanet K2-18b has revealed the "strongest hints yet of biological activity ...

Is 3I/ATLAS an alien probe? Breakthrough Listen uses the Green Bank Telescope to search for technosignatures as the ...

The United States is offering to give illegal aliens $3,000 if they register for self-deportation on the CBP One app by the ...