Download or read book Oxford Reading Tree: Stage 16: TreeTops Non-Fiction: Our Earth is Unique written by Keith Ruttle and published by OUP Oxford. This book was released on 2006-03-09 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: TreeTops Non-Fiction is an exciting extension to the Oxford Reading Tree TreeTops range. Our Earth is Unique - how can a polar bear survive in the freezing cold, but not in a warm rainforest? Explores all the world's biomes.