"Sauce Gardner and Deion Sanders both rose to fame as NFL cornerbacks. But who is the true king of the defensive back? Compare their careers side by side, then choose a winner!"--

Yolanda Ridge is the author of fiction and nonfiction books for young readers, including Evolution Under Pressure: How We Change Nature and How Nature Changes Us, CRISPR: A Powerful Way to Change DNA and Elliot Jelly-Legs and the Bobblehead Miracle. She has a master of science degree and is adept at making complex concepts understandable, a skill she uses in her science writing and teaching. Yolanda lives in Rossland, British Columbia.