Mark has always been interested in more subjects than he has time to pursue in any satisfying way. The short list includes:
| • | Knowledge management |
| • | Community dynamics and online communities |
| • | Information literacy |
| • | Civic literacy |
| • | Hypermedia, multimedia, and web design |
| • | Information technologies and systems |
| • | Learning processes, sensation, perception, cognition |
| • | Online learning systems and dynamics |
| • | Instructional design and courseware development |
| • | Human intelligence and the nature of consciousness |
| • | Environmental quality and sustainability |
| • | The built environment as it relates to sustainability |
| • | Systems theory (including cybernetics, complexity and ecologies) |
| • | Culture transmission, cultural evolution, and memetics |
| • | Sociology and social psychology |
| • | General evolutionary theory |