Bureau International des Poids et Mesures (BIPM). a.k.a. International Bureau of Weights and Measures. The authority responsible for the International System. Located in Sèvres, France, a suburb of Paris
International System of Units. National Institute of Standards and Technology (NIST). Loacted in Gaithersburg, Maryland, a suburb of Washinton, DC.
A clock directly linking time to a particle's mass. Shau-Yu Lan, Pei-Chen Kuan, Brian Estey, Damon English, Justin M. Brown, Michael A. Hohensee, Holger Müller. Science. Vol. 339 No. 6119 (1 February 2013): 554–557.
Demise of the Kilogram. Sixty Symbols. YouTube (2014). This video features Professor Michael Merrifield from The University of Nottingham.
CBC Digital Archives
Canadians rebel against metric system. Canadian Broadcasting Corporation (1982). Throughout the 1970s, the move to metric had some opposition — but that was nothing compared to the full-scale metric rebellion hitting the country by 1982.