How does a planet 95 times the mass of Earth end up light enough to float on water?

How does a planet 95 times the mass of Earth end up light enough to float on water?

Saturn is not light. Its mass is about 568 million trillion trillion kilograms, equivalent to roughly 95 Earths. It holds enough matter to dominate a system of rings and moons, and its gravity at the level conventionally treated as its “surface” is slightly stronger than the gravity beneath our feet. Yet Saturn’s average density is only about 0.69 grams per cubic centimetre. Fresh water is close to 1. In the strict comparison that produces the f…