Compared to the monumental machines of science, things like the International Space Station or the Large Hadron Collider, the human brain doesn’t look like much. However, this three-pound amalgam of squishy cells is one of the most complicated and complex structures in the known universe.

With hundreds of billions of neurons, each with its own inner world of organelles and molecular components, understanding the fundamental wiring of the brain is a major undertaking.

via Researchers model neural structures on the smallest scales to better understand traumatic brain injury.