Your brain is about the size of a head of cauliflower. It looks and feels like a three and a half pound lump of firm tofu. It comprises about two percent of your body's mass, but it uses twenty-five per percent of the body's energy.

Scientists estimate that the brain receives 100 million bits of information per second and contains 100 billion cells, many of which are neurons. These cells have a thin, complicated shape like the branch of a tree. They can be as short as a millimeter or as long as a meter. At one end is the axon and at the other end are dendrites, the twigs on the branch. Neurons communicate with each other by sending chemical and electrical signals racing down the branch at 200 miles an hour. When the charge reaches the end of the cell it leaps the synapse—the space between the dendrite and the next twiggy branch. Each cell is surrounded by ten to 100,000 dendrites creating the possibility of one million billion synaptic connections—that's 10 followed by a million zeros! Compare that to the number of particles in the known universe—10 followed by 80 zeros.

You can see that the brain is complex if not unfathomable. Truly, we are "fearfully and wonderfully made." Just ask your brain.