Data Suggests Early Universe was Superfluid

"an almost perfect liquid."

That is so cool. A perfect liquid is when you're able to swim through it without any friction, and its particles are evenly distributed. It's good for theoretical calculation, but does not exist in real life, or does it?

It's like describing a frictionless surface with a massless pulley, neither of which exists, but both are useful to take into account, for example, how fast an object falls if it is first suspended over the pulley and attached to another object of equal mass sitting on a frictionless surface.

When you do have to take mass and friction into account, you'll have to talk about torque, the force necessary to rotate the pulley (which wouldn't be necessary if the pulley was massless), as well as the force necessary to overcome friction.

Blah, blah, blah. Okay, I'm done. But it's cool nonetheless. The early universe was not a gas, but a nearly perfect formless liquid.

For those who are Christians, they probably are reminded of how God first created the ocean as a way to separate the boundary between the sky and the place on which animals and plants would live.