How gravity causes a perfectly spherical ball to roll down an inclined plane is part of the elementary school physics canon.

We’ve got mixed feelings about a new video from [AndysMachines] that details how he makes custom ball screws. On the one hand, there’s almost zero chance that we’ll ever have an opportunity ...

No, ball-rolling is actually an entire subgenre ... rolling around at the speed of legal grey areas. As tempting as it is to laugh off the game's style and obvious inspirations as "meme culture ...

To some clockmakers, this is a shame, as the escapement can be an elegant and mesmerizing piece of machinery, so [Brett] brought his rolling ball escapement to the exterior of this custom clock.

This activity really focuses on our timing, speed and teamwork ... Player one can try kicking the ball instead of rolling. Or you could increase the distance between both players so it's ...