Blood, sea snails and a whole lot of urine went into some of your favourite paintings. This brief history of colour explores the strange alchemy of paint making.
Historians say there should be a lot more shipwrecks on the bottom of the ocean than there currently are. So who, or what, is taking them?
Watch this touching tribute to the late André Cassagnes, inventor of the Etch A Sketch, animated on the device itself.