More than a hundred years ago, the father of modern neuroscience, Santiago Ramón y Cajal demonstrated that information is the output of messy internal wiring provided by the brain’s chemical synchronicity.

Cajal was an artist trapped in a laboratory. He used his trained skills as an artist to draw masterful sketches of the brain. In doing so, he illustrated the neuron doctrine.

But where the Renaissance master goes sensual, macro, and dynamic, the Spaniard zeros in, mapping the miraculously microscopic using new methods of staining slide tissues that isolated single cells under the microscope. In this way, Cajal drew the newly visible synaptic networks of the brain and discovered a breakthrough that proved that neurons are in touch without touching. These results changed neuroscience. His work is still widely used as a teaching device.

Vulture Magazine

He called the connection between the neural impulses synapses, the gaps between the neurons that allowed them to talk to each other. However, he couldn’t identify the synapses under the microscope like we can with 200X magnification today.

You can still walk across an invisible bridge even if you can’t physically see it there. All you need to know is that the magic is working.