Shark cartilage has been used to make artificial skin for human burn victims.

Although the outsides of a bone are hard, they are generally light and soft inside. They are about 75% water.

In WWII, when allied armies reached the Rhine River the first thing men did was pee in it. This was pretty universal from the lowest private to Winston Churchill (who made a big show of it). Gen. Patton had himself photographed in the act.

A M A Z I N G   F A C T S