In the animal world, there are many mysteries and interesting things that we have not discovered yet. Or if they have discovered them, not everyone knows about them.
1. Sea otters and "hand in hand" sleep
Besides being so cute, sea otters have a habit that really makes all hearts melt, which is holding hands when going to sleep.
Oh baby, isn't this…
However, they are not romantic or in love with each other. The reason behind it is quite pragmatic: just so as not to be swept away by the waves while sleeping.
Usually there will be dozens of otters holding hands, forming a stable raft when sleeping so that the waves do not wash them away. In the case of sleeping alone, the otters will fix themselves on seaweed.
2. Squirrels are animals that know… grow trees
Surely everyone knows that the two mischievous squirrels Chip and Dale (Disney's "bloody" character) love chestnuts. But in fact, besides chestnuts, red squirrels also like to eat many other nuts, like acorns. They are very diligent in collecting seeds and then burying them in the ground to store them.
Unfortunately, if you compare the red squirrel with the goldfish, it's probably one nine and ten in terms of forgetfulness. Sometimes, the squirrels also forget the location of their "treasure", so that the seeds sprout and sprout into new trees. Every year, thousands of new trees are grown thanks to the forgetfulness of the squirrels.
3. Dolphins have their own names and they know it
Dolphins are an extremely intelligent and affectionate animal. In particular, they are considered the only animals that can "name" each other if not counting humans.
A dolphin research team has been collecting the animals' sounds for more than 10 years. They found that each dolphin emits a unique sound to announce their presence.
This sound can be detected at a distance of up to 20km depending on the depth of the sea level and the frequency of the sound. Especially when it comes to calling a certain individual, they can copy the sound of that dolphin. That proves that they can be distinguished from each other by their cries – the same way humans call each other's names.
4. Quokka – The happiest animal in the world
Quokka is a species of marsupial in the same family as kangaroos, living in several small islands of Australia. This animal is known as the happiest animal in the world, not because its life is fun, but because its mouth is always grinning.
This mouse has a gentle nature, friendly with people and especially likes… selfie.
5. Penguins know… propose marriage
Penguins have a very romantic "custom", that is, when a suitable mate is found, the male will propose to the female bird.
Pretty human, right? Only difference is that the male birds are very smart, do not spend money to buy rings like humans. He just needs to pick up a beautiful stone and give it to his children to have his wife take him back to the palace.
6. Cows have best friends
In a herd, cows may be close to one or certain individuals. This has been demonstrated by separating several close cows into a new herd. If they go alone, they will feel stressed, productivity will decrease. But if they go together, it makes no difference at all.
