We often forget how wonderful it is that life exists, and what a special and unique phenomenon it is. As far as we know, ours is the only planet capable of supporting life, and it seems to have arisen in the form of something like today’s single-celled prokaryotic organisms.
However, scientists have not given up hope of finding what they call LUCA (Last Universal Common Ancestor, the ancestral cell from which all living things we know are descended) beyond the confines of our planet.
