Weird Life

If other life forms exist on other planets or their moons, must their biochemistry be like ours? “Weird life” describes hypothetical life forms that rely on a fundamentally different biochemistry from anything currently known. For example, could life be based on silicon rather than carbon? Could it rely on a liquid other than water? This isn’t just science fiction anymore, but real questions proposed and studied by astrobiologists at NASA and universities around the world. What light can chemistry shed on these questions?