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

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 ...

"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 ...

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 ...

Mysterious rocky exoplanet with cratered surface floating in front of a colorful cosmic nebula filled with glowing stars, galactic dust and bright light flares in deep outer space. Dramatic astronomy ...