Glen DelGiudice and Erika Butler of the Minnesota Department of Natural Resources use an ultrasound to check the thickness of body fat on the rump of a tranquilized moose in January 2011 near Greenwood Lake in Lake County. The young bull was fitted with a GPS collar to help scientists track its movements. (2011 file / News Tribune)
Read the article: What’s killing Minnesota moose? New, high-tech study aims to find out
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