Mark Ratzlaff

Beauty Mark

Mark Ratzlaff

Annabelle is an eight year old beauty queen who wants to stop competing.

Heritage Minutes: The Discovery of Insulin

Mark Ratzlaff

Jeremy Schuetze, Dean Petriw

Scientists Banting, Best, Collip and Macleod at the University of Toronto as they race for a treatment to cure 13-year-old Leonard Thompson of his life-threatening diagnosis of diabetes.