For those who want to go more off-road than off-road vehicles can take them, there is the Toyota Moguls, a concept car designed for forestry workers. Each of the wheels can be extended independently, streching out into gullies or retracting when going over humps. The vehicle, which requires no special training to drive, can therefore remain level on bumpy terrain and can travel on forest trails that would defeat conventional four-wheel-drives.
Source: NYTimes.com (ANDREW POLLACK, November 5, 1995)