What is capybara smiling?

Capybaras are known to have a unique facial expression that appears like a smile. They have a slight upward curve on the corners of their lips, which can make them appear like they are smiling. However, it is not a genuine smile like that of humans as capybaras do not possess the same emotions as humans. They use this expression as a means of communication in social situations or as a response to positive stimuli, such as when they are being petted or scratched. It is important to note that not all capybaras smile, and some individuals may have a more neutral or even frowning expression.