Frog scientist speaks of environmental peril, amphibian mass extinction

  • Bo Petersen
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  • Monday, December 3th, 2012
    Dr. Tyrone Hayes, a noted biologist, gives a lecture at the College of Charleston on a common pesticide that is demasculating frogs. (Brad Nettles/postandcourier.com) 11/30/12

    Dr. Tyrone Hayes, a noted biologist, gives a lecture at the College of Charleston on a common pesticide that is demasculating frogs. (Brad Nettles/postandcourier.com) 11/30/12 Buy this photo