Contact: Michael Bernstein
American Chemical Society
Caption: Located two kilometers underground in a nickel mine in Ontario, the Sudbury Neutrino Observatory consists of a 12-meter-diameter acrylic vessel filled with 1,000 tons of ultrapure heavy water. It is surrounded by almost 10,000 light-sensitive photomultiplier tubes.
Credit: Minfang Yeh, Ph.D.
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