Just three weeks after conception, the embryonic brain generates a quarter of a million neurons every minute.
About 20% of the body’s energy is channelled to the brain, yet it remains staggeringly efficient, consuming less energy than a filament light bulb.
The human brain isn’t fully developed until the mid-twenties – much later than experts once thought.
The internal clock that controls sleepiness runs up to three hours ‘late’ in teenagers, although scientists aren’t quite sure why.
Even into old age neurons are still building new connections and circuits, maintaining our ability to adapt and learn.