Other areas of inquiry Cosmology

Cosmologists also study:

* whether primordial black holes were formed in our universe, and what happened to them.
* the GZK cutoff for high-energy cosmic rays, and whether it signals a failure of special relativity at high energies
* the equivalence principle, and whether Einstein's general theory of relativity is the correct theory of gravitation, and if the fundamental laws of physics are the same everywhere in the universe