But a roller skate’s wheels are small so they can ... why not try and spot as many different things that use the circular motion of a wheel and axle mechanism, as you can? Some wheels, like ...

YouTuber The Slow Mo Guys, who shoots various things with a high-speed camera and observes them in slow motion ... in which a watermelon is tied to a skateboard and run by rocket propulsion.

The wheels are in motion Wednesday to build a new skate park in Malibu. The city of Malibu approved $4.1 million Tuesday for the construction of a new skate park set to open this fall. Malibu City ...