You might not even know it, but your genetics might make you rarer than you think you are!

Add Yahoo as a preferred source to see more of our stories on Google. Stay sharp and learn something new every day or stock up on knowledge for the next 105 days with these fun facts about life, ...

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 ...