Karl Ward showcases his invention — a pedal-powered unicycle. Los Angeles, 1971.

Instead of a traditional wheel, Ward’s creation used artificial legs. The pedals drove a mechanism that propelled the structure forward and helped maintain balance. The concept aimed to allow people to “walk” while seated.

Ward’s invention earned a unique place in the world of alternative transportation. However, due to its lack of speed and challenging operation, it never gained widespread popularity.

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