Snakes can't blink — they have no eyelids, just a transparent scale covering each eye.
Fact #3659
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The Trail of Tears forced Native American tribes westward in the 1830s.
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The human body contains about 206 bones.
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The human body replaces many of its cells regularly.
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The McGurk effect shows how visual cues can alter what we hear.
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Stem cell research explores regenerative medicine.
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The human brain can process visual information in as little as 13 milliseconds.
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A dog’s nose print is unique, similar to a human fingerprint.
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A giraffe's heart can weigh over 20 pounds.
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