Download or read book When Giant Mammals Thundered written by Jean F. Blashfield and published by Heinemann-Raintree Library. This book was released on 2005-11-23 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Imagine the blooming of the very first flower. Or a 3-ton sloth with massive claws standing as tall as a giraffe. And horses the size of small dogs that have toes instead of hooves. This is not a dream or vision of an artist or author. This is North America over 20 million years ago! Journey into the distant past with this book and witness the earliest events in North America; when mammals rose from the shadows of the extinct dinosaurs to fill the land, and the first flowers and grasslands bloomed.