Tyrannosaurus rex had teeth that could grow over 12 inches long.
Fact #619
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The brain consumes a significant portion of the body's energy.
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The fangtooth fish has some of the largest teeth relative to body size in the ocean.
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The brain named itself.
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The human body produces red blood cells in bone marrow.
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An ostrich's eye is larger than its brain.
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A giraffe's heart can weigh over 20 pounds.
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The use of defibrillators can restore normal heart rhythm.
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The human eye can distinguish millions of colors.
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