"Throughout their lives, all sharks grow new teeth, with one set of teeth constantly growing in behind another.
The teeth are located in rows which rotate into use as needed. The first two rows are used in obtaining prey, the other rows rotate into place as they are needed. As teeth are lost, broken, or worn down, they are replaced by new teeth that rotate into place."
Think I'll wait until scientists can duplicate the rotating teeth of sharks.
How are these scientists going to brush their teeth now?