A sci-fi idea is gaining supporters, from billionaires to city councils. Whether it's feasible is another matter.

Astronomers studying an oddball brown dwarf called “The Accident” have finally spotted silane, a long-predicted silicon ...

Taking steps to cool the planet means not only cutting emissions but also pulling carbon dioxide (CO₂) from the air. While technology-based solutions have been widely studied, a simple, nature-based ...

Ancient organisms may have left microscopic "biosignatures" on Mars. That's according to NASA scientists, who say a rock ...

NASA’s Perseverance rover found possible signs of ancient life in rocks on Mars, keeping scientists up at night.