Depending on your dental hygiene, you will probably see a thin, yellowish-brown line where the enamel meets the gum. To see what she is describing, stand in front of a mirror and examine the rear surfaces of your lower front teeth. IT IS the only part of your body that fossilises while you’re still alive,” says Tina Warinner at the Max Planck Institute for the Science of Human History in Jena, Germany.
