In fact, the future of humanity may be similar to that of mitochondria, the energy powerhouses of cells. Mitochondria were once independent organisms, but at some point, an ancestral cell engulfed those primitive bacteria, and over evolutionary history, mitochondria let cells gradually take over all the functions they used to perform, until they only produced energy.
“We’re becoming like the mitochondria. We provide the energy — we turn on the machines,” Slonczewski told LiveScience. “But increasingly, they do everything else.”