750,000,000 years ago, the first neurons sparked to life in little Hydra, our most distant relative.
Hydra live forever as long as they have food. What was the early food that allowed the Hydra to sustain itself? We know some creatures live and survive in the deepest depths of the oceans, presumably surviving of sulpher gasses seeping from the earth’s molten core.
Eventually, Hydra grew into larger swimmers, the biggest and most clearly linked of which that remain today are The Octopus. Some of these species were able to crawl out of the water and grew protective outer shells in order to survive longer, just as Chickens today use Vitamin D from the sunlight to grow shells for their unborn eggs.
Eventually, these land creatures developed other skills to survive and expand their ancestry. The most productive species to date has been Humans, who with their tribal communication skills and art and music have been able to build cultures that sustain themselves.