The Dynasphere was a monowheel vehicle design which was patented in 1930 by Dr J. A. Purves. Purves' idea was inspired by a sketch made by Leonardo da Vinci. The vehicle had a top speed of 30 mph. – WTF Fun Facts
Source: Dynasphere - Wikipedia

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The Dynasphere was a monowheel vehicle design which was patented in 1930 by Dr J. A. Purves. Purves' idea was inspired by a sketch made by Leonardo da Vinci. The vehicle had a top speed of 30 mph. – WTF Fun Facts
Source: Dynasphere - Wikipedia
hidden brain
The bridge of taylorswift‘s mashup of Enchanted and Wildest Dreams makes me feel like I could run a fucking marathon.