|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||2 days ago||60.41||$44.83||You save $15.58|
|Amazon US||4 days ago||57.23||$44.83||You save $12.40|
Gary Kemper is a writer and Hallie Kemper is a longtime homeschool educator who has taught science classes for multiple homeschool education groups in the greater Los Angeles area. Casey Luskin is both a scientist and an attorney and is research coordinator for the Center for Science and Culture at Discovery Institute in Seattle.