Wheelchair technology has never allowed users to go anywhere but on a fairly flat, level path. That’s all changed, thanks to self-taught engineer Brad Soden. When his wife Liz was paralyzed over a decade ago and couldn’t realistically go to many places, Soden set out to transform accessibility. Two years later, he finished building this tank-like machine that can go almost anywhere—and now he makes them for many. Best of all, all the money from the sales of these wheelchairs goes right back into research.