How Did Multicellular Life Evolve?
quantamagazine.org
quantamagazine.org
Though such directed evolution experiments can't tell us what happened during evolution, they can give us great insight into evolutionary processes.
I was also surprised to learn that we think multicellularity evolved over 50 separate times, and most of those were well before animals got around to it.
Finally I like to dream that such research could give us insight into the type of ecosystems we'd like to design (e.g. our society and machines).