Most substances can exist as a solid, liquid or gas ... to the source of the ammonia because hydrogen chloride diffuses more slowly than ammonia. Gas particles move very quickly - particles ...
Some atomic gases can also behave like superfluids ... that can become a superfluid have eluded scientists. Hydrogen is typically impossible to study in liquid form—it becomes a solid at -259°C ...
Even the icy planets in our solar system such as Neptune, Uranus or Jupiter's moon Europa, might have harboured plastic ice ...