More than 99 percent of all life forms have gone extinct during the 3.6-billion-year history of life on Earth. Other organisms have changed dramatically, but not our extreme survivors. Evolution may have altered their physiology and behavior, but their body plans have stood the test of time.  

How have these living links with Earth's prehistoric past survived? The search for answers is leading scientists to new discoveries about the past-and future-of life on Earth. The survival secrets of some of these ancient creatures could lead to new medicines and treatments for disease.  

Written in a lively, entertaining voice, Extreme Survivors provides detailed life histories and strange "survival secrets" of ten ancient animals and explains evolution and natural selection. Extensive back matter includes glossary, additional facts and geographic range for each organism and a geologic timeline of Earth.

Science writer Kimberly Ridley is an award-winning author of nonfiction books for children. Her joy is sharing her love of nature and writing with children through her books and school visits. Kimberly's picture books, The Secret Pool (Kirkus starred review) and The Secret Bay, have received honors including Riverby Awards from the John Burroughs Association for "outstanding natural history books for young people." Her newest book is THe Secret Stream A former magazine editor, Kimberly has written for publications including The Boston Globe, the Christian Science Monitor, and Downeast Magazine. She holds an MS in Science Journalism.