1: Chimpanzee. Chimpanzees can learn sign language to communicate with humans. Topping our list of smartest animals is another great ape, the chimpanzee.
#1: Orangutans
Orangutans come in the first place here for a very interesting reason. Much like chimpanzees, the orangutan is able to use tools, learn sign language, and have complex social structures that involve rituals.
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.
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.
Humans have the highest EQ at 7.4, but bottlenose dolphins have EQs of 5.3, significantly higher than all other animals.
There are several possible answers to this question as different animals display varying levels of intelligence. However, some experts suggest that the animal with the lowest IQ is the sloth.
Cats have a 200 times stronger memory than dogs and can recall the details of a day for up to 16 hours. Although dogs may be better at helping people, cats have much more sophisticated brains. Dogs only have 160 neurons in their brains compared to cats' 300 neurons, making them one of the smartest animals in the World.
Chimpanzees. As our closest living relatives, chimpanzees have unsurprisingly shown themselves to be exceptionally intelligent. They also have impressive short-term memories – better than our own. Chimps can remember the location of numbers flashed before them for a fraction of a second.
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.
Some researchers say pigs are even smarter than 3-year-old human children! Pet pigs can learn lots of circus tricks. They can learn how to find food using a mirror and even how to play video games using a joystick! Check out this video of a pet pig performing tricks!
Though this data might seem to suggest that dogs are twice as intelligent as cats, a direct correlation between larger brain size and increased intelligence has not been conclusively proven. Regardless, dogs' higher neuron count is often viewed as a gauge of their superior intelligence.
Horses and Dogs are both intelligent animals, but they have different cognitive strengths. Horses excel in areas like navigational intelligence while dogs do better with social intelligence. Neither animal is smarter than the other, that's just what makes them unique!
Many bivalvia and nearly all gastropoda molluscs have evolved only one foot. Through accidents (i.e. amputation) or birth abnormalities it is also possible for an animal, including humans, to end up with only a single leg.
Dogs score higher in perceived intelligence ratings than cows, for example, yet a study in the 1970s demonstrated that in a test cows could navigate a maze as well as dogs, and only slightly less well than children. The point was made that our perception of an animal's ability is influenced by how we test them.
The oldest near-complete tetrapod fossils, Acanthostega and Ichthyostega, date from the second half of the Fammennian. Although both were essentially four-footed fish, Ichthyostega is the earliest known tetrapod that may have had the ability to pull itself onto land and drag itself forward with its forelimbs.
Results showed that the dogs, having larger brains to begin with, had more than twice as many neurons in their cerebral cortex as the domestic cat, with around 530 million cortical neurons to the cat's 250 million. (For comparison, there are billions of neurons in the human brain.)
A study from the University of Sydney and the University of Roehampton in London suggests that kangaroos are capable of intentionally communicating with humans, suggesting a higher level of cognitive function than previously thought.
To date, there's only one species that has been called 'biologically immortal': the jellyfish Turritopsis dohrnii. These small, transparent animals hang out in oceans around the world and can turn back time by reverting to an earlier stage of their life cycle.
Even the dog owners out there, you betrayed your best friend? Well yes, chimps have way more brainpower than dogs. They can use sign language, drive cars and perform complex tasks.
eLife digest
The human brain is about three times as big as the brain of our closest living relative, the chimpanzee.
Jellyfish have no brains at all, so they do not even have an IQ.
There is no zero point for IQ. We do not think of a person as having no intelligence (although we may be tempted to make that evaluation upon occasion).
According to several behavioral measures, Coren says dogs' mental abilities are close to a human child age 2 to 2.5 years. The intelligence of various types of dogs does differ and the dog's breed determines some of these differences, Coren says.