I had no idea until about 30 seconds ago! They are two boney things that are useful for “eating and for grooming, manipulating objects, killing prey, fighting, probing for food, courtship and feeding young.”
Amazing! This wiki search also reminded me of an odd fact – if you follow the first link on any wikipedia page (that is not in brackets) you will eventually end up at mathematics….. except town planning. Try it!
Hmm that is a great question! I guess they have evolved that way and so there must have been some advance to them over not having a beak in the way they chose to live. I imagine a beak would be good for scooping bits out of the bottom of rivers etc… i love watching ducks peck at the bottom of a pond… suck funny feet and tails… http://goo.gl/JsGfS