Avery Elizabeth Hurt & Susan K. Mitchell 
Regeneration [PDF ebook] 
Regrowing Heads, Tails, and Legs

Animals have many different ways to protect themselves from their enemies. Only a few have the amazing ability to regrow body parts that have been bitten or pulled off by predators. It’s called regeneration, and even scientists aren’t exactly sure how it works. With this fascinating volume, readers will learn what animals possess this super power, how they use it, and what the limits are to this nifty survival trick. Discussions of scientific research are presented in interesting and accessible language. Detailed photographs, fact boxes, and in-depth sidebars enhance the narrative.