From magazine covers to Hollywood blockbusters, neuroscience is front and center. This popular interest has inspired many questions from people who wonder just what is going on in the three pounds of tissue between their ears.

In Brain Bytes, neuroscience educators Eric Chudler and Lise Johnson get right to it, asking and answering more than one hundred questions about the brain. Questions include: Does size matter (do humans have the largest brains)? Can foods make people smarter? Does surfing online kill brain cells? Why do we dream? Why can't I tickle myself? Why do cats...