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Fossils are echoes of an ancient past. Find out about the two major categories of fossils, how fossilization occurs, and how fossils can help paint a picture of the planet's history.
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《国家地理》
documentary
earth
动物
fossils
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Source: 《国家地理》
Could the future of farming rely on pooping fish? Considered to be a sustainable alternative to traditional farming, aquaponics is changing the way we grow food.
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《国家地理》
documentary
earth
动物
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