* There are millions of living things on planet Earth, and in the highest classification of living things is the animal kingdom, which is distinguished by having most of its people by having a brain.  Humans are considered one of the finest living things on the planet.  Because he is the smartest at all, as the human being is distinguished by reason, intelligence, the ability to learn, understand problems and solve them, as he is able to perceive ideas and feelings, make tools, and practice the art of deception.

  * The human mind is an intelligent mind compared to other creatures, but this does not prevent other animals from possessing an intelligence commensurate with some human characteristics and actions.  In the following, we will review the most intelligent animals from the most intelligent to the least intelligent:

  * The chimpanzee is considered the smartest animal in the world, and it ranks first in intelligence among all animals, as chimpanzees are a type of monkey that lives in tropical forests in Africa, and its origin goes back to the "Hominidians" or what are called "hominins".  Chimpanzees live in caves close to water bodies, and they are very similar to monkeys except that they are larger and more powerful, as their length ranges between 130 and 160 cm, and their weight does not exceed 60 kg.  98% of chimpanzee genes correspond to human genes.

  * Therefore, chimpanzees are distinguished by their having an intelligence ratio close to that of a human being, and they are able to learn and perform the tasks that need them to think, and they also have the best and strongest memory among all the animals of the world, and scientists considered it better than human memory in memory tests.

  * Chimpanzees can adapt easily in any place, use body language to communicate what they want, are distinguished by speed of understanding, and have the ability to imitate, and their sense of sight is one of the finest senses, and comes in the front of the head to cover long distances, as chimpanzees can see in depth  Big on which he can distinguish the ripeness of the fruit.

  * Chimpanzee is a social animal that quickly learns human imitation, some become connected to his beloved breeder in zoos to the point that he screams to call him when he gets sick, and refuses to take medicine from anyone else.  Scientists created a list of 20 separate voices in chimpanzee language.

  * Dolphins, or what is called "diphtheria", are ranked second among the smartest animals in the world.  Dolphins are whale-like aquatic pets, ranging in length from (1 - 3.5 meters) and prefer to live in warm waters in the world's seas and oceans, and feed on fish and squid.  Scientists consider dolphins very intelligent animals, as they imitate the human voice in a distinctive way without being asked to do so.

  * She is able to learn quickly, as she is able to accept the directives presented to her by those who train her, and it is easy for her to communicate with and understand people with him, and to establish special relationships, and she is also able to learn from her past mistakes, and not to fall into them again.  As for the dolphin with a pointed nose, it is the smartest among dolphins at all, and it has been observed that its brain size is larger than other dolphins.  He employs this dolphin in marine shows, as it is easy to train and socialize with him, but those who learn animal behavior have another reason to consider the dolphin intelligent.  He is able to create and play several games on his own.

  * Dolphins have been used in armies and military operations by some countries, such as: Russia and Israel.  The history of this military use of dolphins began in 1966 from the Soviet Union in Crimea.  The function of these dolphins is to search for torpedoes, unexploded sea mines and weapons at a depth of 100 meters, and a gun is installed on them to kill any suspected divers.

  * As for the third smartest animal in the world, it is the elephant.  Most of the elephants in the world live either in Africa or in India, and despite their different types, they are all distinguished by intelligence.  The elephant is considered in many cultures of the world as a symbol of wisdom.  The intelligence of elephants is exemplified by their supernatural ability to communicate with each other, to show feelings and emotions, and they are distinguished by having a very strong memory, as they can remember even after several years.

  * It is one of the pets that is used in acrobatic performances, and it does not harm anyone unless he harms it.  Elephants are animals that live in herds, and they are very social with each other, as they comfort each other when sadness, and play together in the water, and communicate with each other by the vibrations they emit from their feet, and they can recognize themselves in the mirror.

  * Octopus is the smartest invertebrate animal ever, its brain and eyes are considered the most developed among invertebrates.  He can focus his eyesight precisely, and he can also adapt to the change of light, and after the octopus's brain processes the information it receives from the eyes in the visual lobe, it uses it with its delicate sense of touch to make very smart decisions.

  * Through the various research of scientists, they discovered the ability of the octopus to find different ways to reach its goal, such as opening a jar to reach its food.  Other intelligent animals The rest of the scientists differed on the order of the rest of the animals in which the smartest ones were, but they did not differ on their intelligence and ability to learn.  Among these smart animals: the crow, the African parrot, rhesus monkeys, Border Collie dogs, cats, mice, squirrels, pigs, and the jumping spider.