Ok.
So its not really liquid or hot but more of warm cloaking thing..
But it seems a team of scientist believe they have discovered a layer of plasma which is part of the Earth’s magnetosphere. Some of the interesting points are how it is believed to only cover 3/4 of the planet and actually rotates thruout the day to protect various parts of the planet.

Could this be a link in the puzzle of making other planets habitable? Only time can tell..