title: Breakthrough of the year. Areas to watch in 2003.
mesh_terms: D055580:Astronomical Phenomena; D001256:Astronomy; D005075:Biological Evolution; D002017:Budgets; D002980:Climate; D004601:Elementary Particles; D005118:Extraterrestrial Environment; D007053:Ice; D012586:Science / Q000191:economics / Q000639:trends*
chemical_list: D007053:Ice