Abstract: The QCD axion explains why QCD almost preserves the charge-conjugation parity symmetry. The QCD axion is also a dark matter candidate and is under intensive experimental searches. I will introduce new cosmological evolutions of the QCD axion as a result of natural but unexplored initial conditions in the early universe, such as a non-zero Peccei-Quinn charge asymmetry. These evolutions allow the QCD axion to be dark matter in the mass range where the conventional cosmological evolution struggles. The new axion dynamics also creates the baryon asymmetry of the universe. The new evolutions may be probed by future astrophysical/cosmological observations.