Rotating mechanisms can be a headache when it becomes necessary to deliver power through them. [Igor Brkic] faced just such a challenge when creating his double-pendulum build, and solved it with a ...

Walk into nearly any science museum worth its salt and you're likely to see a Foucault pendulum, a simple but impressive device for observing the Earth's rotation. Such pendulums have been around for ...

I am going to make a prediction. As people start to get bored with their fidget spinners, they are going to start playing with these double pendulum fidget spinners. The normal spinner has a bearing ...