Some people believe we know everything about such thing as our body, since we study biology at school, read books, and watch ...

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 ...

Here are some undeniable facts: The Earth orbits the sun. Water freezes at 0 degrees Celsius (32 degrees Fahrenheit) at standard atmospheric pressure. Humans require oxygen to survive. The speed of ...