Astrobiology

Oxygen, methane, strange starlight—biosignatures promise proof of alien life, but false positives lurk everywhere. Scientists are building probabilistic tools to finally tell truth from illusion.

A Martian meteorite ignited a scientific war three decades ago, and it's still raging. Meanwhile Perseverance rover unearths tantalizing organic clues buried in Jezero Crater's ancient rocks.

Could micrometeoroids have seeded Earth with water and life's building blocks? We explore panspermia, deep subsurface bacteria, and Antarctic lakes that mirror Europa's hidden ocean.

Frank Drake's famous equation mapped the search for cosmic life—but now scientists ask if Earth is even the best place for life, introducing the startling idea of "superhabitable" worlds.

Labs are edging toward creating life from scratch, forcing hard questions about what truly separates living from non-living—while astrobiology pulls astronomy, geology, and biology into one grand mission.

From underground microbes to distant exoplanet atmospheres, astrobiology's grand question—are we alone?—edges closer to an answer that could reshape humanity's place in the cosmos.