What is a fossil? Sometimes it's the imprint of an ancient leaf in a rock. Or it could be the skeleton of a dinosaur that has turned to stone. With clear prose and beautifully detailed illustrations, award-winning author and illustrator Aliki describes the different ways fossils are formed and what they tell us about life on Earth long ago.

This is a clear and appealing science book for early elementary age kids, both at home and in the classroom. It includes a find out more section with a glossary and activity guide so kids can create their own fossils for someone to find a million years from now.

Author/illustrator Aliki has penned four books listed as "exemplary" titles in the Common Core Standards and is a widely recognized name in nonfiction for children. Both text and artwork of this updated edition were reviewed for accuracy by paleontologist Dr. Kathryn Hoppe and by Dr. William F. Simpson of the Field Museum.

This is a Level 2 Let's-Read-and-Find-Out, which means the book explores more challenging concepts for children in the primary grades. The 100+ titles in this leading nonfiction series are:

• hands-on and visual
• acclaimed and trusted
• great for classrooms

Top 10 reasons to love LRFOs:

• Entertain and educate at the same time
• Have appealing, child-centered topics
• Developmentally appropriate for emerging readers
• Focused; answering questions instead of using survey approach
• Employ engaging picture book quality illustrations
• Use simple charts and graphics to improve visual literacy skills
• Feature hands-on activities to engage young scientists
• Meet national science education standards
• Written/illustrated by award-winning authors/illustrators & vetted by an expert in the field
• Over 130 titles in print, meeting a wide range of kids' scientific interests

Books in this series support the Common Core Learning Standards, Next Generation Science Standards, and the Science, Technology, Engineering, and Math (STEM) standards. Let's-Read-and-Find-Out is the winner of the American Association for the Advancement of Science/Subaru Science Books & Films Prize for Outstanding Science Series.