Dragonflies visually track prey using only sixteen neurons. That's a testament to how complex a single neuron is, not how easy the task is. Dragonfly eyes each

Dragonflies visually track prey using only sixteen neurons. That's a testament to how complex a single neuron is, not how easy the task is. Dragonfly eyes each have thousands of facets and sensory cells. How many transistors would we need to process that input, in multiple colors, and identify and track prey in real time? It's a heck of a lot more than sixteen.