Jiggling Jell-O is hypnotizing, ain’t it? Major props to sturgeon bladders for initiating that universal fascination. Ever heard of isinglass? 

Isinglass is a form of gelatin derived from the air bladders of sturgeon. Isinglass was, and sometimes still is used to make jellies and clarify wine. As one might imagine, the supply and demand went down when modern gelatin was discovered. 

Use today’s Word of the Day: Why does Jell-O Jiggle?