Neuroscientist proved that synapses, the million billion connections in your brain that make you remember and understand stuff, grow mainly at night when you are asleep.
But because the brain has billions of neurons, of which millions could be involved in any single task, scientists have puzzled over how it knows which synapses to tweak and by how much.
Your brain contains around 100 billion neurons that communicate with each other across gaps called synapses using proteins and chemicals called neurotransmitters.