In 1996, Denver's public schools went back to the neighbourhood system for the first time in more than 20 years.

ECONOMIST: Integration (1)

ExoMars is a challenging, difficult but tremendously important project if we ever want to have a robotic exploration programme in our neighbourhood in the Solar System.

BBC: Esa-Nasa Mars missions' race against clock

GPS the global positioning system to select a neighbourhood at random within the town.

ECONOMIST: The Iraqi war