A photograph supposedly showing the mouth of an adult suffering from hyperdontia (i.e., an excessive number of teeth) has been circulating online for several years. In February 2019, the Facebook page ...

Hyperdontia is when too many teeth grow in your mouth. The extra teeth usually grow directly behind or close to your usual primary or permanent teeth. What is hyperdontia? Hyperdontia is a condition ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...