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

"We therefore caution against the use of phosphine as a biosignature until these discrepancies are resolved." When you purchase through links on our site, we may earn an affiliate commission. Here’s ...

Phosphine gas detected on Venus suggests the presence of oxygen-free microbial life, though findings are still unconfirmed. Such life would be invisible to the naked eye and fundamentally different ...

The finding suggests phosphine—a potential biosignature—shouldn’t be viewed as evidence of alien life until natural, non-biological sources are ruled out. Reading time 5 minutes For scientists, the ...

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

Mysterious rocky exoplanet with cratered surface floating in front of a colorful cosmic nebula filled with glowing stars, ...

The first time Fontella “Faun” Day believes she saw life from another planet, it came from above. It was a cloudy afternoon in Rachel, Nevada, and the phones and computers at the Alien Cowpoke gas ...