Labels:text | screenshot | font | document OCR: . More than 150 of the most significant machines are explained through animation, narration, illustration, and clear, concise text · New live-action video sequences allow David Macaulay to actively demonstrate how his favorite inventions work · The new, top-level interface makes it even easier to navigate through the disc, and encourages users to explore the disc fully · Many of the fundamental principles of physics are clearly and enthusiastically explained by Macaulay and Mammoth . All the inventions and machines can be seen in their historical context . There is also a section containing biographies on some of the most influential inventors