What is the biggest change in the skull anatomy from the Dawn horse to the modern horse?

Answer 1

The biggest change in skull anatomy from the Dawn horse (Eohippus) to the modern horse (Equus) is the elongation and modification of the skull structure. The modern horse has a longer and more pronounced nasal region, which accommodates a larger nasal cavity for increased oxygen intake during high-speed running. Additionally, the dental structure has evolved; modern horses have larger, more complex molars adapted for grinding tough vegetation, while earlier horses had smaller teeth suited for a different diet. These changes reflect adaptations to different environments and lifestyles over millions of years.