Vivid photos and up-to-date information teach readers about Mars, including details on climate and geography, how scientists have explored the planet, and what they hope to find out about Mars in the future.
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What's an Audio Format Audio format refers to the way an audiobook is recorded. Not all audiobooks have the same formats. Classic Audio: A human reading an audiobook without the text displayed. VOICEtext (H): Human narrator with text that you can follow along with as it reads. VOICEtext (S): Synthetic voice with text you can follow along with as it reads.
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