Dogs have 20 teeth in their maxilla (upper jaw) and 22 teeth in their mandible (lower jaw ... their permanent teeth when they age as their bones start to weaken. But an otherwise healthy adult ...

This is an ancient Taimyr Wolf bone from the lower jaw. The animal lived approximately 27,000 to 40,000 years ago. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news ...