Tiny Space Particles Just Made Splashes in the Universe's Oldest Soup!

Scientists have discovered that the super-hot stuff that filled the baby universe behaves just like a liquid, complete with tiny ripples and splashes. When even smaller particles blasted through this cosmic soup, they left swirling wakes behind them like a little duck swimming through water! Can you imagine a liquid so hot and dense that it can slow down particles moving at the speed of light?