Download or read book Machines Then and Now (Oxford Read and Discover Level 4) written by Robert Quinn and published by Oxford University Press. This book was released on 2015-02-05 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Read and discover all about machines in the past and today. When did people invent the wheel? What is a nanobot? Read and discover more about the world! This series of non-fiction readers provides interesting and educational content, with activities and project work.