Today I learned that human beings are the only animal in which the white of the eyes is permanently exposed.

Today I learned that human beings are the only animal in which the white of the eyes is permanently exposed.

Experts estimate that white allows us to use our eyes not only for vision but also for the media: because of the white of the eyes, others can see where we are looking - and guess what we think.

Source: https://pursuit.unimelb.edu.au/articles/why-we-show-the-whites-of-our-eyes