The Science Siblings, Adam and Paige Jacobson, recruited 4-year-old Tukker and 2-year-old Jayger for a density experiment. They tested whether fruits and veggies float or sink in a bowl of water.

What is density, and how does it apply to the universe? From dogs and water to stars and galaxies, this video uses humor and relatable examples to break down one of the most fundamental concepts in ...