the.com/astrobiology
the science with zero confirmed subjects and infinite patience
extremophilesEarth microbes survive boiling, radiation, and vacuum
goldilocks zoneWhere water stays liquid, not too hot or cold
tardigradesSurvived raw open space on a 2007 mission
biosignaturesHunts gases like phosphine as life's fingerprints
young fieldNASA coined modern usage only in 1995