In early June, the Global Brain Health Institute hosted Suzana Herculano-Houzel, a Brazilian scientist who challenged the dogma that the brain has a hundred billion neurons. Herculano-Houzel could find no evidence or origin for this claim, so she set out to count every neuron herself. Her book The Human Advantage chronicles her journey into the brain to prove that humans fall short of this number. In the end, she found that the human brain has 86 billion neurons, far fewer than other species with bigger brains. Her message: humans aren’t as special as we think we are.