Goosebumps are a leftover reflex from when our ancestors had enough body hair for the raised hairs to make them look larger to predators.
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Tyrannosaurus rex had teeth that could grow over 12 inches long.
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A rhinoceros has thick skin for protection.
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The McGurk effect shows how visual cues can alter what we hear.
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Some animals can regenerate entire body parts.
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The saber-toothed tiger is more accurately called Smilodon.
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The invention of the hypodermic syringe enabled effective drug delivery.
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The human skin is the body's largest organ.
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