Every now and then, someone takes a data set and does something absolutely illuminating. Here, the BBC has graphically mapped every road casualty on every road in Great Britain from 1999 to 2010. That’s 2,396,750 crashes, with each individual point of light representing an individual crash resulting in a casualty (that’s injury or death).
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.