Figure 3.

Schematic representations of EDF, IDF, and CD over time for different astrobiologically relevant worlds: (a) Earth, (b) Mars, (c) Venus, (d) Europa, (e) Titan, (f) a hot Jupiter, (g) a hypothetical “chaotic world,” (h) a hypothetical “superhabitable” world. Only certain major events are plotted for simplicity; in reality, these curves would be far more time-varying than shown here. We assume here that, for all three parameters, the ideal range for emergence is less than that for evolution/complexification. Importantly, the reader should note that these diagrams are all hypothetical; a robust calculation of these metrics over time has not yet been done.