Sign up for the free Nautilus newsletter: science and culture for people who love beautiful writing. Small may be mightier than we think when it comes to brains. This is what neuroscientist Marcella Noorman is learning from her neuroscientific research into tiny animals like fruit flies, whose brains hold around 140,000 neurons each, compared to the roughly 86 billion in the human brain. In work published earlier this month in Nature Neuroscience, Noorman and colleagues showed that a small netwo...