There are about 85 billion neurons in one human brain. These are all branches of just one cell: a starburst neuron in the retina. The blobs are synapses, called boutons, discovered by gamers on EyeWire.
Explore them in 3D yourself on eyewire.org and join 70,000 people from 130+ countries playing a game to map the brain.
PS: Join us for a Hangout on Air with EyeWire HQ this Tuesday at 3 pm ET!