  We have observed Bose-Einstein condensation (BEC) of trapped atomic hydrogen,
and studied it by two-photon spectroscopy of the 1S-2S transition. In these
lecture notes we briefly review the history of spin-polarized atomic hydrogen
and describe the final steps to BEC. Laser spectroscopy, which probes the
difference in mean field energy of the 1S and 2S states, is used to study the
condensate, which has a peak density of 4.8e15 cm^-3 and population of 10^9.
