Gaia is the title of a composition in eight movements, tracing the origins and development of natural sounds on this planet, from the moment before Big Bang to the present day. With the exception of the 7th movement, Homo, the seven completed drawings follow the sequence of the music - towards Big Bang/the foundation of Gaia/voices from the sea/voices of insects/voices of birds/voices of mammals/voices of homo/the voices of Gaia.