> Date: Tue, 10 Mar 1998 20:36:22 -0800 > From: Walter Bordne <email@example.com> > To: aRomero@ACC.FAU.EDU, firstname.lastname@example.org > Subject: Nar whales and tusks > > I am in grade 2 and my class would like to know if Nar whales loose > their do they grow back? > Bradley Dear Bradley: Narwhals like the rest of the odontocetes or toothed cetaceans have only one set of teeth during their lifetime. That means that if they loose a tooth they cannot replace it. It has been argued that the teeth of odontocetes are in reality "milk" teeth and that the "adult" teeth never really develop. Best wishes, Aldemaro Romero, Ph.D.