Every year, scientists send people and robots into our solar system to explore space. How are scientists preparing for journeys to Mars? What are robotic explorers and how do they study the incredible planets and moons at the outer reaches of our solar system? Learn more about these thrilling missions.
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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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