|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||5 days ago||62.3||$45.14||You save $17.16|
|Amazon US||3 days ago||61.55||$45.14||You save $16.41|
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.