If there is an issue in a science, philosophers will attend to it. This is not new, either. Since the rise of modern science in the seventeenth century, many if not most of the problems that philosophers have addressed or formulated have arisen out of science one way or another. Books on ‘the philosophy of botany’ or ‘the philosophy of natural history’ were published from the late eighteenth century onwards, although ‘philosophy’ meant knowledge in those days, and included scientific thinking. Nevertheless, science has always been a productive source of new problems for philosophy to chew on.