Mars, Pluto, and an array of icy moons offer possible places where microbial life might have existed — or might yet exist today.
Earth’s neighbor once had a climate conducive to life. Now scientists are trying to learn if the Red Planet turned those chances into reality.
Jupiter’s icy moon is a great candidate for habitability. But life’s best chance to exist is beneath the crust.
Titan’s soupy skies drizzle complex hydrocarbons onto the moon’s surface, potentially providing the building blocks of life.
This tiny saturnian moon may be, pound for pound, the most valuable piece of real estate in the solar system.
Neptune’s moon Triton shows tantalizing evidence of water beneath its jumbled crust, making it a high-priority target in the search for life.
Who would have thought this dwarf planet could nurture life? The idea seemed ludicrous before New Horizons explored the world.
In Every Issue