Understanding the building blocks for an electronic brain

Computer bits are binary, with a value of 0 or one. By contrast, neurons in the brain can have all kinds of different internal states, depending on the input that they received. This allows the brain to process information in a more energy-efficient manner than a computer. Physicists are working on memristors, resistors with a memory, made from niobium-doped strontium titanate, which mimic how neurons work.