Symmetry Breaking and Conservation

From nextbigfuture: Mach Effect Propulsion Levels Becoming Significant and Reliable, so it appears momentum is not conserved under certain conditions. And Casimir effect experiments demonstrate energy is not conserved. This means that the universe is asymmetric in some manner because conservation doesn’t always work. Spontaneous symmetry breaking describes how the universe could be in an asymmetric state yet still be symmetric overall.