The human stomach can dissolve razor blades

If you ever swallow a razor blade, don’t panic. The human body is more capable than you think. Acids are ranked on a scale from 0 to 14—the lower the pH level, the stronger the acid. Human stomach acid is typically 1.0 to 2.0, meaning that it has an incredibly strong pH. In a study published in the journal Gastrointestinal Endoscopy, scientists found that the “thickened back of a single-edged blade” dissolved after two hours of immersion in stomach acid. That’s just one of many fun facts about the human body you never learned in school.

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