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Are animals smart? – Deron
It’s a fascinating question that intrigues millions of pet owners, animal lovers, veterinarians and scientists all over the world: Just how smart are animals?
Scientists once believed a brain with billions of neurons was a requirement for intelligence. After all, that’s why you’re able to think – neurons are the nerve cells in the brain that connect and transmit messages to each other.
For the record, the human brain has about 86 billion neurons. For comparison, dogs and cats have less than one billion.
Yet the more that scientists like me study animal emotion and cognition – the ability to learn through experiences and thinking – the more we find that humans are not very special at all. Many nonhuman species can do these things too.
Right now, there’s no agreement on how to decide whether a particular animal species is intelligent. But most scientists who study animal cognition have observed that many animals are able to solve problems, use tools, recall important information about their environment and recognize themselves in the mirror.
Measuring an animal’s intelligence is harder than you might think.
Toolmaking bears and crows
Memory is a marker of intelligence. Of all animals, humans possess the most accurate and sophisticated memory. But elephants can recognize as many as 30 traveling companions at a time. They also learn to migrate away from drought-prone areas, based on memories of earlier droughts.
That kind of recall – known as episodic memory – is the ability to remember an event, including when and where it occurred. Until recently, scientists thought only humans had it. But now researchers have learned that some birds, cats, rats, monkeys and dolphins have it too.
Crows are among the smartest of animals.
Santiago Urquijo/Moment via Getty Images
Animals may not remember every experience – neither do people – but they do recall things critical to their survival. For example, birds know where they stored food. Monkeys know the presence of a predator.
Scientists once thought tool use was an exclusively human ability, but that’s not so. Chimpanzees use sticks to catch termites and stones to crack nuts open. Crows can even manufacture tools. By bending a wire, they can make a hook to retrieve a food reward that’s otherwise out of reach.
Researchers presented eight captive brown bears with this food challenge: Three objects – a large log, a small log and a box – were placed in an outdoor enclosure. A food reward was suspended above them. Six of the eight bears were able to move the logs and box into positions that enabled them to fetch the reward….
