The Amazon rainforest produces about 20% of the world's oxygen.
Fact #3746
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Fossils have been found on every continent, including Antarctica.
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The Amazon River accounts for about 20% of all fresh water discharged into the world's oceans.
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The Olympic rings represent five inhabited continents.
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The ocean contains structures larger than mountain ranges.
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The eradication of polio in many countries marked a major health milestone.
Fact #1233 · Geography
About 50% of marriages end in divorce in many developed countries.
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Norway has a town called Å.
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The Roman navy played a key role in Mediterranean dominance.
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