Well, in larger planets like jupiter and saturn the intense pressure creates liquid metallic hydrogen. Liquid metallic hydrogen is a phase of hydrogen in which it becomes electrically conducting like a metal. Because hydrogen is the simplest molecule, just one proton and one electron, it forms a simple solid when compressed or cooled. Under high pressures it becomes superconducting and behaves like a superfluid. Superfluids are insanely weird. They defy gravity with viscosity and can even seep through things we consider impenetrable to liquids. https://aip.scitation.org/doi/10.1063/5.0002104