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 ...

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 ...