What I learned today 11-28-12

Today I learned that penguins can change saltwater to freshwater. This can occur because of a gland near the penguin's beak that filters saltwater. Once the gland is full, the penguin will then smash his beak on a rock to empty it out. I found this fact to be interesting because I had no idea that any mammals could create freshwater from saltwater. This would be a very useful ability to us humans.