‘You cannot step into the same river twice.’ So says the enigmatic ancient philosopher, Heraclitus, in this, his most famous aphorism. Heraclitus saw the universe as a place of constant flux where nothing was permanent and all things were subject to an unending process of change. If the river is the universe and the water is all the stuff that happens in it, then every time you step off the bank to cool your feet, you are paddling in different stuff - and the stuff flows by,

CAN YOU DANCE ON THE EDGE OF AN ABYSS? There are certain pivotal moments in human history - moments that fundamentally change humanity’s conception of itself and of its place in the universe. Is such a moment upon us now? If so, how should you respond? HUMANITY RELEGATED (1543) The prototype for such a moment was the publication of Nicolaus Copernicus’ book De Revolutionibus in 1543, expounding the theory of heliocentrism. The discovery that the earth was not the centre of th