This footage of an Euler’s Disk is nominally educational, but the main takeaway is how relaxing it is to watch and listen to a shiny disk spin on a mirror. Euler’s Disks are designed to illustrate the ...

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 ...