Imagine - you are young and have only seen the passage of a few seasons, but now you need to grow the food that sustains your family. You see the hand of Death steal across the countryside as Summer turns to Autumn. The leaves fall from the trees, thedays grow short and the nights grow long and cold. You have no light, save that of flickering fires which need forays into the cold for fuel. And you see the giver of warmth, of Light, and of Life, grow watery and weak.

This matters to you, in a way that it is almost impossible for anyone reading this screen to know. More than five thousand years must pass before Galileo determines that the Earth passes round the Sun and Kepler establishes the slightly elliptic orbit - in short before there is an intellectual framework which tells us why each Winter holds the promise of a Spring