Recent Results from the Wilkinson Microwave Anisotropy Probe

The Wilkinson Microwave Anisotropy Probe (WMAP) is currently mapping temperature and polarization anisotropies of the cosmic microwave background radiation on the full sky in 5 microwave bands. We summarize major scientific results obtained from the first year data released on February 11, 2003: (1) precision determinations of the cosmological parameters, (2) discovery of early reionization of the universe, and (3) implications for the Inflationary paradigm.