It is only since global media and digital communications became accessible to ordinary populations - with Telstar, jumbo jets, the pc and mobile devices - that humans have been able to experience their own world as planetary in extent. What does it mean to be one species on one planet, rather than a patchwork of scattered, combative and mutually untranslatable cultures? One of the most original and prescient thinkers to tackle cultural globalisation was Juri Lotman (1922-93). On the Digital Semiosphere shows how his general model of the semiosphere provides a unique and compelling key to the dynamics and functions of today's globalised digital media systems and, in turn, their interactions and impact on planetary systems.

Developing their own reworked and updated model of Lotman's evolutionary and dynamic approach to the semiosphere or cultural universe, the authors offer a unique account of the world-scale mechanisms that shape media, meanings, creativity and change - both productive and destructive. In so doing, they re-examine the relations among the contributing sciences and disciplines that have emerged to explain these phenomena, seeking to close the gap between biosciences and humanities in an integrated 'cultural science' approach.

John Hartley is John Curtin Distinguished Professor at Curtin University, Australia; previously founding Dean of Creative Industries at QUT, inaugural Head of the School of Journalism, Media and Cultural Studies at Cardiff University, Wales. He has published over 30 books on cultural, media, communication and journalism studies, and more recently creative economy and cultural science, with Google Scholar citations approaching 40,000.

Indrek Ibrus is Professor at Tallinn University, Estonia and the head of Center of Excellence in Media Innovation and Digital Culture (MEDIT: http: //medit.tlu.ee/). His main strand of research is media innovation and the co-evolutionary effects of textual, social and economic dynamics in shaping the new forms of media. He is the co-editor (with Carlos Scolari) of Crossmedia Innovations: Texts, Markets, Institutions (2012).

Maarja Ojamaa is a research fellow at Tallinn University, Estonia and a member of MEDIT (http: //medit.tlu.ee/). Her research has followed the paradigm of Lotmanian cultural semiotics, exploring transmediality, both on the micro level as a textual phenomenon and on the macro level as a mechanism of cultural auto-communication. Her work has been published in the International Journal of Cultural Studies, Sign System Studies, International Journal of Communication.