Well, the conservation of angular momentum only applies to the angular momentum of an isolated system, which as far as we know doesn't exist. As soon as you have two particles in the universe, it's not an isolated system anymore.
Thanks for your warm welcoming btw. :)
Hello!
I was thinking the other day, of the Earth's rotation around its axis.
If one spins a boiled egg, it maintains spin longer than does an unboiled. Eventually both stops because of the friction against the floor, but not at the same time.
The Earth has different levels of viscosity...