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National Laboratory for Genetic Resources Preservation
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Fort Collins, Colorado - Tanks of liquid nitrogen store semen from cows and other animals at -320 degrees F at the National Laboratory for Genetic Resources Preservation. The lab is part of the Department of Agriculture. Beth Krehbiel (left) a graduate student at Colorado State University, and animal geneticist Harvey Blackburn open a cyro tank. As the liquid nitrogen inside boils, Blackburn will vacuum the escaping vapor to enable a clear view of the contents.
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