Add Yahoo as a preferred source to see more of our stories on Google. The singer recently took to the viral video app to reveal the Euler’s Disk she bought. Unveiling the gadget from its box, she ...

Watch Euler’s Disk in action and discover the physics behind its spinning motion, changing speed, and fascinating behavior as ...

In this video I show you something called Euler's disk. This is a disk that has very little rolling friction. I talk about ...

Thanks to the lovable geeks on TV’s “The Big Bang Theory,” an Escondido inventor’s decades-old toy is now spinning with new life. On the popular show’s Feb. 16 episode, astrophysicist Raj tried to ...

If you purchase an independently reviewed product or service through a link on our website, SheKnows may receive an affiliate commission. The singer recently took to the viral video app to reveal the ...