Scientists at the University of Illinois speculate that teenagers' brains shrink going from adolescence to adulthood. In lab rat tests, neurons disappeared from the prefrontal cortex in male and female pups undergoing puberty. Suddenly it all makes sense: endless discussions during diner, kids running off the table, slamming doors, unexpectedly occupying the bathroom for hours, no more drop-off at school but walk the last end 'alone', activism, loss of innocence, body piercings, fashion changes … . All of this due to neural pruning?! We believe there is more.