Enter the BAC Mono. Now, there is still a prohibitive price barrier here – it costs darn near 80,000 pounds ($134,000 at today's rates) in its home market – and it's a pretty single-minded beast.

It was 2011 that the Ryno electric unicycle began making news. Three years later, the news is that the one-wheeled commuter transport vehicle is shipping: head to the Ryno Motors site and you can ...