2-4 ┊ 2166 words ┊ ◄))
2-4, 2166 words, 18 minutes audio time.
We spend our whole lives on Earth, but the planet still has secrets! From ancient cultures who wondered about our place in the universe, to modern scientists who drill deep into Earth’s core, map the oceans, and send humans to the moon, people are passionately curious about the planet we call home. Vivid photos and illustrations, scientist spotlights, and sidebars help unlock the secrets of planet Earth.
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