Life Beyond Earth

Life Beyond Earth

Mars rover on rocky terrain, showing its camera mast, equipment, and six wheels against a dusty, reddish Martian landscape.
Organic compounds can form through simple chemistry alone — making the search for true biosignatures trickier than it seems.
A dark, rocky planet orbits in space with the sun illuminating its edge, surrounded by stars and distant cosmic clouds.
In the search for life in the Universe, the ultimate goal is to find an inhabited planet beyond Earth. How will we know when we've made it?