A whale's heart is so large that a small child could crawl through its arteries.
Fact #10241
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The ocean covers more than 70 percent of Earth's surface.
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The ocean contains dissolved gold — approximately 20 million tons — but in concentrations too low to extract profitably.
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A group of jellyfish is called a smack, a bloom, or a swarm.
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The ocean contains structures larger than mountain ranges.
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Prehistoric oceans had different currents than today.
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Some fish can walk on land.
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Coral reefs are formed by tiny marine animals called polyps.
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Some whales can hold their breath for over an hour.
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