Video: how do bikes stay up?

"Perhaps more incredible than humans riding bicycles is the fact that bicycles can ride themselves".

Once set in motion, a bike can stay upright and, if knocked from one side, will steer itself so the wheel once again ends up under the centre of mass, allowing it to continue in the new direction.

But how does it happen?

As this illuminating video, by Minute Physics, explains, with a lone bicycle eerily heading off across a field by itself, it's down to three main mechanisms, which are all related to the bike's ability to steer and right itself, given enough momentum.

Although this helps explain the mechanics behind Bradley Wiggins' self parking bike, the exact combinations of variables which work to make the bicycle stay upright on its own still aren't known to science, leaving a tantalising degree of mystery. Enjoy!