Several studies have shown that pigs are even smarter than dogs and cats, and they are able to solve problems quicker than many primates. Their cognitive abilities can be compared to those of a three-year-old human.
Pigs have the intelligence of a human toddler and are ranked as the fifth most intelligent animal in the world! In fact, pigs are more intelligent and trainable than any breed of dog. They learn their names in just two weeks and come when they're called.
Studies show that dogs have a significantly higher number of neurons in the brain than cats, primarily due to their larger brain size. Although the dog's brain is larger than the cat's, there's no clear winner here either.
CHIMPANZEES. RECKONED to be the most-intelligent animals on the planet, chimps can manipulate the environment and their surroundings to help themselves and their community. They can work out how to use things as tools to get things done faster, and they have outsmarted people many a time.
Pigs are gentle creatures with surprising intelligence. Studies have found they're smarter than dogs and even 3-year-old children! In the wild, pigs form small groups that typically include a few sows and their piglets.
Within the encephalization quotient proposed by Jerison in 1973, values above one are classified big-brained, while values lower than one are small-brained. The domestic cat is attributed a value of between 1–1.71; relative to human value, that is 7.44–7.8.
Chimpanzees
This research has firmly established that chimps are one of the most intelligent species on earth.
Several studies have shown that pigs are even smarter than dogs and cats, and they are able to solve problems quicker than many primates. Their cognitive abilities can be compared to those of a three-year-old human.
Studies of emotion in pigs reveal that they are sensitive and complex animals. Pigs exhibit emotional contagion, a capacity thought to be the basis for empathy, or the ability to feel the emotional state of another.
They have broad social abilities too, like distinguishing individuals out of a group; communicating with each other through touch, smell, sound, and sight; and learning to pick up on the verbal and nonverbal cues of humans. Researchers have even found that pigs are able to use tools and play video games!
Much research exists showing pigs are highly intelligent animals that feel pain similar to humans, and that pigs squeal when they sense pain.
Dolphins are often cited as the second smartest animals on Earth due to their relatively high brain-to-body size ratio, the capacity to show emotion, and impressive mimicry of the dumb apes who research them.
In their natural state, pigs are very clean animals. They keep their toilets far from their living or feeding areas. They are much more tolerant of colder temperatures than heat. Pigs have no sweat glands so they can't sweat.
Pigs are affectionate animals and they do seek out human attention. However, they don't want to be held or “thumped.” They do want to snuggle up with you after a long day and take a snooze while you watch TV. They want to flop over for belly rubs and will run up to you if you've been gone for a while.
Chimpanzees. Chimps are our closest relatives in the animal kingdom, so it's unsurprising they display intelligence similar to that of humans. Chimps fashion spears and other tools, display a wide range of emotions, and recognize themselves in a mirror.
The human brain is about three times as big as the brain of our closest living relative, the chimpanzee. Moreover, a part of the brain called the cerebral cortex – which plays a key role in memory, attention, awareness and thought – contains twice as many cells in humans as the same region in chimpanzees.
The encephalization quotient (EQ) (the size of the brain relative to body size) of elephants ranges from 1.13 to 2.36. The average EQ is 2.14 for Asian elephants, and 1.67 for African, with the overall average being 1.88.
The average dog's IQ is about 100. Based on the results done to test a dog's IQ, it turned out that dogs, even the average ones, have the IQ same as a 2-years old human.
The genius child, Adhara Pérez Sánchez, has an IQ that beats Albert Einstein — whose IQ is estimated to be around 160.
We all know Dolphins are intelligent, in fact Dolphins are listed as the animal third in intelligence, after pigs and chimpanzees.
However, some experts suggest that the animal with the lowest IQ is the sloth. These creatures are known for their slow movements and lack of energy, which suggests that they may not be as intelligent as other animals.
Koalas. Koalas are not only extremely cute, they're smart, too! The marsupials know how to listen to their bodies and can dive into a deep sleep for an average of 22 hours a day. Koalas snack on eucalyptus leaves, which aren't high in nutrients—the abundant rest makes this diet possible.