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Talk about a bizarre feature of the human body: If you happened to swallow a razor blade, your stomach acid would dissolve it. Acids are ranked on a scale from zero to 14—the lower the pH level, the ...

Even if you weren’t someone who got excited about science class in school, now—as an adult—it’s hard not to be amazed by science facts. Seriously, just stop for a minute and think about what both the ...