When is the human brain fully developed? Answer here
Where in the world are boys aged 15-19 more likely to die a violent death? Answer here
According to psychologist Ethan Kross from the University of Michigan, what is making us lonely, unhappy and unsociable? Answer here
What do you do on 'National Punch Day'? (20th Septmebr) Answer here
What happens to words accepted into the Scrabble dictionary? Answer here