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The Sudbury Neutrino Observatory (SNO) was an underground neutrino observatory in Ontario, Canada in operation from 1999 through 2006, aiming to detect solar neutrinos using a scintillator of heavy water (i.e., with 2H) with hopes of solving the solar neutrino problem. Super-K (in Japan) solved this already, but SNO produced a stronger confirmation. More recently, the detector has been revived in modified form, now called SNO+. It now uses a different substance as scintillator and its current goal is detection of neutrinoless double beta decay as well as general detection of neutrinos and of various particle interactions. SNOLAB is the current name of the facility at which the SNO and SNO+ were/are conducted, which conducts some other such experiments and houses related research and development.