Top 9 most interesting things about animals that you may not have heard of

Human beings are not only the species with the highest IQ on this planet, but also seem to be the species with the richest emotions. However, this does not mean that other animals are muddled and dealt with every day. In fact, animals also have emotions and feelings, and some behaviors are very similar to humans, but most people are not conscious and aware of this. Today, l will introduce you to 9 interesting and cold things about animals that you may not have heard.

1. Squirrels plant thousands of trees every year

Squirrels have been foraging for food all their lives. They climb trees, scan the forest floor, looking for nuts and seeds. They hide most of these seeds and nuts for later use and ensure that there is enough food to eat in the winter when food is scarce. They tend to rely on a strong sense of smell to help them find buried food. Therefore, they often forget where their food is hidden. And inadvertently planted many trees for the land.

It is estimated that because squirrels inadvertently forgot where to hide their nuts, millions of trees are planted every year around the world.

2. Puffins usually have only one partner in their lifetime

Puffins are amazing things, their beaks change color throughout the year. In winter, the color of the beak is dark gray, while in spring, its beak blooms an incredible orange. It is believed that bright colors help puffins to evaluate potential companions. At the same time, they are also very similar to humans. They seem to be practicing "monogamy" and rarely change their partners. Couples usually return to the same place every year to build a nest. Before building a nest, they perform a mating ritual, where they rub their beaks. Puffins build nests and breed, and take turns taking care of their children.

3. Chicken is the closest creature to Tyrannosaurus Rex​

Scientists finally discovered a close relative of the mighty Tyrannosaurus Rex, and in the hearts of many people, Tyrannosaurus is the most feared and famous of all dinosaurs. For the first time, the researchers managed to sequence the protein of this long-extinct animal, which allowed them to discover many molecules with remarkable similarities to the humble chicken in the modern world.

The research provided the first molecular evidence for the idea that birds are the modern descendants of dinosaurs, and overturned the long-standing paleontological hypothesis that in the process of hundreds of fossils, fine organic molecules were completely destroyed. This may indicate that scientists may one day be able to imitate Jurassic Park by cloning dinosaurs.

4. Dolphins can call each other's "names"

In the 1960s, scientists Melba and David Caldwell discovered that dolphins not only have their own language, but when they call their friends, they also have their own names. They also learned that dolphins are not born with iconic sounds, but develop in the first year after their birth. The young dolphins pieced together unique sound patterns from the sounds heard in their surroundings, which may be based on the mother's voice. In order to function like names in human language, dolphins not only need to repeat their own names, but they also need to call other people's names to call them.

5. When in danger, the otter may show its cubs to win sympathy

Otters can also live on land, but they are considered semi-aquatic. Except for reptiles such as lizards and snakes, they mainly eat fish and other marine life. Although most otters have little predatory threat, otter mothers still need to be vigilant. Wolves, eagles, and big cats (such as cougars and jaguars) will prey on fragile young otters. A female otter in danger will take all necessary measures to defend against predators, including endangering her own life. Interestingly, when they are in danger, some otters will make a loud breathing sound; otters will show off their cubs to make predators have compassion for them.

6. Oysters can change their gender

Oysters change their gender at least once in their lives. All oysters start as males, but most oysters become females permanently by the age of one year. Their reproductive organs produce both sperm and eggs, and they can change sex at will. Therefore, it is technically possible for oysters to fertilize their eggs.

7. The hippocampus has only one partner in its lifetime

Under normal circumstances, the hippocampus has a partner throughout its life, and males and females will get together and dance together every morning to strengthen the bond between husband and wife. They change color when they move together, and sometimes they wrap around the end.

8. Sea otters sometimes hold hands while sleeping

Sea otters sometimes hold hands while sleeping to prevent each other from floating. Usually, the mother and cub will hold each other tightly during rest to prevent each other or other members of the companion from drifting.

9. Cows become best friends with other cows

Research done by Christa McLennan of the University of Northampton shows that cows do have "best friends."

In this study, cows were kept with other cows twice every 30 minutes, once with a favorite partner, which is the "best friend", and another with a cow they did not know Cow. During this time, they measured the cow's heart rate. Facts have proved that when they are with their best friends, the cow's heart rate is significantly reduced and the overall stress is also less.