There seem to be many. Have a look at some of the related questions already archived in my cosmology area. For example, the ratio of helium to hydrogen atoms in our universe is regulated by the number of families of neutrinos that exist. With more neutrinos that the three known types ( electron, muon and tauon) there would be LESS helium in the universe than the approximately 24 percent seen. If fewer than 3 types, there would be far more than the 24 percent of helium we see. Also, the very faint irregularities seen by the NASA COBE satellite in the cosmic background radiation left over from the Big Bang, according to Inflationary Big Bang theory, is the imprint of quantum irregularities in the primordial 'scalar field' which caused the universe to inflate from 10^-24 centimeters to tens of centimeters in 'size' after the first 10^-34 seconds after the Big Bang. These vastly magnified quantum irregularities are now seen in the cosmic background radiation itself which covers the entire sky today!