There are a lot of things in this universe that we understand very well. But the thing that is understood the least might be human consciousness. Despite our intimate knowledge of brain structure and function, we still don't quite understand how the brain produces the subjective reality that we label consciousness. Well neuroscientist Joel Frohlich specifically studies consciousness, and he is here to tell us all about exactly what we know, how we know it, and what we have left to learn! Also check out the website Knowing Neurons for lots more information on the brain.