Peter Cooper is known for inventing the steam locomotive. By 1945, with cars taking over the world, he experimented in cooking with gelatin.
This gelling agent is a processed version of collagen, the elastic in our skin and tendons. It's made by grinding up the bones and tissues of cows and pigs, which weakens collagen protein bonds. Pouring gelatin powder in boiling water breaks the weak bonds. As the concoction slowly cools in the fridge, some bonds don't reconnect. These gaps are filled with water and give the dessert its wiggle.
The picnic favorite didn't take hold until Pearle Wait, a carpenter in Upstate New York, added a dose of sugar, artificial fruit flavoring and color. His wife, May, named the concoction Jell-O.
Got a question? Email it to Life's Little Mysteries and we'll try to answer it. Due to the volume of questions, we unfortunately can’t reply individually, but we will publish answers to the most intriguing questions, so check back soon.