"Star Trek" is home to countless alien species, many of whom offer beloved characters. Some are not. We rank the 10 most ...

It’s hard to keep up with all the discoveries made around the world every year in science, but harder still to sort the hype ...

Neutrinos may be nearly invisible, but they play a starring role in the Universe. Long-standing anomalies had hinted at a ...

The research is mounting up that we might not be alone in this big wide world. So what's the likelihood that aliens are out ...

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

Tantalising signs of past microbial life showed up on Mars this year, but to truly know whether they contain the answer to ...

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

The Kepler-22b reveal flips the storyline of the series. What started as a story about Earth going through a bizarre ...

The Terra Hunting Experiment will track the wobbles of dozens of stars nightly for years in the most focused hunt yet for an ...

New laboratory studies could shed light on a rock containing potential signs of alien life that’s stranded on Mars ...

Why have disclosures from government officials about non-human intelligence been met with silence? Psychology explains the ...

In a year full of standout shows, io9 picks the very best genre stories to hit the small screen. io9 watched a lot of TV this ...