Book excerpt: Inspired by geosciences, Sonic Acts zooms in on planet Earth. Fundamental to 'The Geological Imagination' is the thesis that we live in a new geological epoch, the Anthropocene. Human activity has irreversibly changed the composition of the atmosphere, the oceans, and even the Earth's crust. Humanity has become a geological force. Consequently, the perspective has shifted from the human at the centre of the world to the forces that act on timescales beyond the conceivable. The way we see the world, understand the systems and processes of nature, and our intentions and interactions with the planet are central to this book.