This work focuses on the existence of klinotaxis in C. elegans movement generation. Klinotaxis occur as small but important neural circuit generates movement signals in response to the environment. Specifically, sinusoidal movement of the head occurs as a function of central pattern generation in the brain and behavioral response to the environment.
The second item involves the BB8 droid from the upcoming Star Wars movie. As the first spherical rolling droid of the Star Wars metaverse, BB8 is also a very real mechanical prototype called the Sphero. And now you can build your own ! By capitalizing on a principle called holonomic motion, the body moves independently of the head, which balances on the rolling body. The following article (How does BB8 Work?) discusses the innovation and the details behind the patent registered by Disney Labs.
 Izquierdo, E.J. and Beer, R.D. (2015). An integrated neuromechanical model of steering in C. elegans. Proceedings of ECAL, 199-206. MIT Press AND Izquierdo, E.J., Williams, P. and Beer, R.D. (2015). Information flow through the C. elegans klinotaxis circuit. PLoS One, 10(10), e0140397.
 For more information, please see: Berkey, R. Make your own Star Wars VII BB8 Droid. Nerdist blog, June 7 (2015) AND How does BB8 Work? http://www.howbb8works.com/