“I shall argue that the distinction between a ‘living planet’ – one that is geologically active – and a living cell is only a matter of definition. There is no hard and fast dividing line. Geochemistry gives rise seamlessly to biochemistry. From this point of view, the fact that we can’t distinguish between geology and biology in these old rocks is fitting. Here is a living planet giving rise to life, and the two can’t be separated without splitting a continuum. Move.”
