Among primates, except for humans whose eyes are clearly black and white, the whites of the eyes of other animals are the same as monkeys and chimpanzees. Of course, they do not have no whites of their eyes, but the whites of their eyes are brown and difficult to distinguish from the blacks of their eyes. After research, scientists believe that these close relatives of humans wear a pair of "big sunglasses" for camouflage and concealment. During the hunting process, if the hunter clearly exposes his sight, it will alert the prey and lose a great hunting opportunity; while for the prey, the unclear sight may give the enemy the illusion that "the other party may have been alert", so that they can escape.
So why are the whites of human eyes white? Scientists believe that when human ancestors walked from trees to the ground, they learned to use fire and various tools, which greatly reduced the risk of being hunted by other animals. In addition, they also needed to communicate more effectively when hunting, foraging, and working together, so the whites of the eyes gradually evolved into white, making the vision more clear and easy to understand. In other words, the reason why humans can communicate through unique eye contact such as winking and flirting is because of the whites of the eyes.
animal tags：
you may also like
Elephants are extremely intelligent and complex animals, and taming them takes time, patience and expert skill. Taming an elephant usually involves establishing a close relationship with the elephant, establishing authority, and using positive training methods. The following is the...
If your parrot is constantly digging out its food, you can try the following methods to solve the problem: 1. Provide a suitable food container: Make sure the food container you provide your parrot is stable enough and deep enough to prevent the parrot from digging out th...
In ancient literature and culture, snakes are often called "snake spirits", "snake demons" or "snake demons". These titles are often associated with the image of snakes in myths, legends and literature. In ancient Chinese culture, snakes are often depicted as creatures with mysterious, strang...
The flamingo is a unique and striking bird. Here are some of its characteristics:Unique appearance: The flamingo usually has pink feathers, which is one of its most distinctive features. This pink feathering is caused by a rich supply of carotenoids, and when they eat food containing carotenoids, th...
Four months old is a good time to start basic training. Here are some training suggestions: 1. Socialization: Make sure your Teddy has positive social experiences with a variety of people, other animals, and the environment. Take him to parks, neighborhoods, and pet-frien...
When you think of living organisms, you might picture animals, plants, or even fungi. But have you ever wondered, “Is bacteria a plant or an animal?” The answer may surprise you! Let’s explore what bacteria are and why they don’t fit neatly into either category.What Are Bacteria?Bacteria are mic...
Puppies can start receiving vaccinations within a few weeks of birth. The following is a generally recommended puppy vaccine schedule: 1. First dose of vaccine (usually at 6-8 weeks of age): This is usually the first dose of a combination vaccine that the puppy receives,...
Red-eared slider is a reptile that is very suitable for living in the natural environment, but it is not suitable for keeping as a pet. The specific reasons are as follows:1. Rapid growth: Red-eared slider is an animal that grows quickly and can easily become very large in a short period of time, re...
Email: jsset#163.com (change # to @) Please indicate your purpose of visit! Guangdong ICP No. 2022053326 XML| map| Chinese
