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Go on an extraordinary journey through the human body with this fact-packed book, 30 seconds at a time! Colorful artwork engages readers with every flip of the page, as the inner workings of the body are revealed, from the bones to the brain. The 30 Seconds series takes readers on a journey of discovery through a wide range of fascinating subjects. Each topic is presented with a quick 30-second soundbite, supported by flash summaries and full-color artwork. Fun, interactive missions with things to make or do support the topics, encouraging readers to test, explore, and discover even more.