From icy moons to ocean worlds orbiting distant suns, scientists continue to discover places that might sustain life as we know it — or something entirely alien. Beneath frozen crusts and within temperate atmospheres, these worlds may hide oceans, chemistry, and climates that echo our own. Some shimmer with water vapour, others with methane seas or magnetic shields.
Each of them tells the same story — that life, once thought rare, may be the universe’s most persistent experiment.
#1: Mars
Once rich with rivers and deltas, Mars preserves ancient channels carved by flowing water. Beneath its rust-red dust lies permafrost and perhaps briny reservoirs, where microbes could survive today. Rovers like Perseverance and Curiosity have detected organic molecules and methane bursts — signs of possible biological activity.
Its thin atmosphere still whispers of a warmer past. Scientists now suspect that Mars’s underground caverns might harbor life in the shadows, safe from radiation.