Brief overview of observational cosmology.
The Standard Model at very high temperature: going above big-bang nucleosynthesis. Neutrino decoupling; QCD phase transition (in a nutshell); Higgs high-T effective potential; symmetry restoration, electroweak phase transition; the vacuum structure of the SM.
Inflation as the origin of structure in the Universe (classical+quantum treatment).
The dark matter problem.
The strong CP problem, the QCD axion, and cosmological implications.