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Dr. Greg Krukonis: Greg Kukonis has a Bachelor of Arts degree in Biology from the University of Pennsylvania and a PhD from the University of Arizona, Department of Ecology and Evolutionary Biology. He has been a postdoctoral researcher at Wesleyan University in Middletown, Connecticut, and Stanford University. He is currently an adjunct assistant professor of biology at Lewis and Clark College in Portland, Oregon.

Tracy Barr: Tracy Barr is a professional writer and editor who has authored or co-authored several other books for Wiley, including Adoption For Dummies, Cast-Iron Cooking For Dummies, Yorkshire Terriers For Dummies, and Latin For Dummies. She lives in Indianapolis with her husband and four children.