Don’t know if systems thinking but WOAH!
Per Reddit (https://www.reddit.com/r/science/comments/atcx8l/researchers_watched_in_real_time_as_a/):
Researchers watched in real time as a single-celled algae evolved into a multicellular organism. The transition took place over the course of 50 weeks and was caused simply by the introduction of a predator to the environment. Time-lapse videos are available in the supplementary info.