Saturn Could Float on Water

Saturn is so light it could literally float in your bathtub if you had one big enough.

This gas giant is the only planet in our solar system less dense than water.

While Earth would sink like a rock, Saturn's density is just point six nine grams per cubic

centimeter compared to water's one gram. Its made mostly of hydrogen and helium,

the lightest elements in the universe. So technically, if you found an ocean massive enough,

Saturn would bob on the surface like a giant cosmic beach ball.