Between 2.7 and 1.2 billion years ago, a new organism appeared: the eukaryotic cell. Present in fungi, plants, algae, and animals, it emerged as a gradual transformation of prokaryotic cell (the cell of bacteria and archeobacteria). In this sense, we are the descendants of bacteria. This incredible evolutionary journey invites us to rethink individuality and functional integration as the outcome of deeply cooperative processes.
