Tooth enamel, the outer layer of teeth, is the hardest substance in the human body, even tougher than bones, protecting teeth from damage and decay, according to a nutritionist.

Human teeth are as tough as a shark’s teeth ... What are the benefits of learning fun facts for children? Fun facts can help improve a child's knowledge by providing fascinating and engaging ...

With Radio 4’s In Our Time getting to the root of the issue, we’ve pulled together some fascinating facts about ... Most children have a full set of 20 milk or baby teeth by the time they ...