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In page Jan Veizer:

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Ján Veizer (born 22 June 1941[citation needed]) is a Slovak-Canadian geochemist. He is the Distinguished University Professor (emeritus)[1] of Earth Sciences at the University of Ottawa and Institute for Geology, Mineralogy and Geophysics, of Bochum Ruhr University. He held the NSERC/Noranda/CIFAR Industrial Chair in Earth System Isotope and Environmental Geochemistry until 2004.[citation needed] He is an isotope geochemist; his research interests have included the use of chemical and isotopic techniques in determining Earth's climatic and environmental history.