Monkeys range in size from the pygmy marmoset, which can be as small as 117 mm (4+5⁄8 in) with a 172 mm (6+3⁄4 in) tail and just over 100 g (3+1⁄2 oz) in weight, to the male mandrill, almost 1 m (3 ft 3 in) long and weighing up to 36 kg (79 lb).
lack the neural control over their vocal tract muscles to properly configure them for speech, Fitch concludes. "If a human brain were in control, they could talk," he says, though it remains a bit of a mystery why other animals can produce at least rudimentary speech.
In the real world, apes can't speak; they have thinner tongues and a higher larynx, or vocal box, than people, making it hard for them to pronounce vowel sounds. But that doesn't necessarily mean they don't have the capacity for language—sign language, after all, doesn't require any vocalization.
Humans have vocal tracts that move freely and can be well coordinated, but the larynx muscles and vocal cords of apes don't have that same movement or coordination, according to the Max Planck Institute for Psycholinguistics.
They concluded that macaques lacked a sufficient supralaryngeal vocal tract, the space in humans that begins in the mouth and follows the hump of the tongue into the throat. Even if a monkey brain had the correct wiring for speech, the monkey vocal tract simply couldn't produce adequate sounds to talk.
Why non-human primates are unable to speak has long been blamed on their vocal anatomy. A long-held theory explicates that monkeys and apes are incapable of, at least, imitating human speech sounds because their vocal tract is not that intricately flexible. In a paper published in “Science” in 1969, Philip H.
Humans and apes, on the other hand, must learn to swim. The tree-dwelling ancestors of apes had less opportunity to move on the ground. They thus developed alternative strategies to cross small rivers, wading in an upright position or using natural bridges. They lost the instinct to swim.
What the Experts Say. It's true that monkeys are distant biological relatives, but it's unlikely they see us as such, experts say. "The reality is that these animals are very opportunistic," said Luisa Arnedo, a senior programs officer for the National Geographic Society, who earned her PhD studying primates.
In short, animals don't have language because they don't have abstract thought and thus have neither the capacity nor the need for abstract designators—words as language. The difference between human language and animal symbols or signals is the difference between abstract thought and concrete thought.
Monkeys and apes lack the neural control over their vocal tract muscles to properly configure them for speech, Fitch concludes. "If a human brain were in control, they could talk," he says, though it remains a bit of a mystery why other animals can produce at least rudimentary speech.
For decades it has been a textbook fact that monkeys cannot speak because their throats and mouths are not set up for it. Their very anatomy prevents them from synchronizing diaphragm, tongue, cheeks and vocal cords in the way humans do when they talk.
The study found that dogs' brains cannot distinguish words that differ by a single speech sound, such as "dig" versus "dog," or "sit" versus "set." This makes dogs similar to human infants, who also can't distinguish between words with similar sounds.
Unfortunately, dogs are unable to understand these distinctions which makes it impossible for them to talk. Furthermore, it is unlikely that they will ever evolve into creatures with this ability, due to the role they play in nature and our lives.
Many researchers into animal language have presented the results of the studies described below as evidence of linguistic abilities in animals. Many of their conclusions have been disputed. It is now generally accepted that apes can learn to sign and are able to communicate with humans.
Wild chimpanzees are usually fearful of humans and will keep their distance. However, there have been recorded incidents of chimpanzees attacking and killing people. This usually happens when humans move into and destroy chimpanzee habitats, reducing their access to food.
Chimpanzees and gorillas normally coexist peacefully where their ranges overlap in the rainforests of Central Africa. The two ape species typically avoid one another, and even feed on the same fruit trees, without conflict, according to Pika.
The canine ability to comprehend human body language and intonation is amazing. Our dogs know more than just “Sit” or “Stay” or “Walk”. They can learn the meaning of many words and can grasp that meaning even better when we say those words in an appropriate tone.
A cat's vocal cords and mouth aren't capable of producing the same sounds that humans do. As we've previously mentioned, it's physically impossible for them to learn to speak any language, English included.
humans and chimpanzees, it is considered unlikely that true human-monkey hybrids could be brought to term. However, it is feasible that human-compatible organs for transplantation could be grown in these chimeras.
Probably not. Ethical considerations preclude definitive research on the subject, but it's safe to say that human DNA has become so different from that of other animals that interbreeding would likely be impossible.