Early Mars seems to have had a protective atmosphere and liquid water in the form of oceans, rivers, and lakes. It may also ...

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

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

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 ...

Pluribus imagines Kepler-22b as an ocean world that sends a gift to humanity through radio waves. In real life, no such ...

Following speculation that comets could have been alien spacecrafts, more and more experts in the field are convinced that ...

In 2025, astronomers sharpened their view of the planetary system around Proxima Centauri — the sun's closest stellar ...

If nonliving materials can produce rich, organized mixtures of organic molecules, then the traditional signs we use to ...

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

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

The best reason to send humans to Mars isn’t for guts or glory—or the construction of colonies to safeguard against existential Earth-bound risks. Instead it’s to answer a single, simple question: Is ...

In the many decades of NASA exploration, there has only been one detection that got on that scale. It was collected by the ...