The animal kingdom is vast and varied, with millions of different species living today. Readers will learn about Earth's most recognizable animal groups, from creepy crawly insects to fierce jungle cats and massive sea creatures. Compelling text encourages readers to investigate further into interesting species Glossaries provide definitions of important vocabulary words Sidebars and timelines illustrate how these animals have grown and changed over time Additional content for further learning on this subject available at www.factsfornow.scholastic.com