New research shows that we have grossly underestimated both the scope and the scale of animal intelligence. Primatologist Frans de Waal on memory-champ chimps, tool-using elephants and rats capable of empathy.
(..)
A growing body of evidence shows, however, that we have grossly underestimated both the scope and the scale of animal intelligence. Can an octopus use tools? Do chimpanzees have a sense of fairness? Can birds guess what others know? Do rats feel empathy for their friends? Just a few decades ago we would have answered "no" to all such questions. Now we're not so sure.
Experiments with animals have long been handicapped by our anthropocentric attitude: We often test them in ways that work fine with humans but not so well with other species. Scientists are now finally meeting animals on their own terms instead of treating them like furry (or feathery) humans, and this shift is fundamentally reshaping our understanding.
(..)
We also may need to rethink the physiology of intelligence. Take the octopus. In captivity, these animals recognize their caretakers and learn to open pill bottles protected by childproof caps—a task with which many humans struggle. Their brains are indeed the largest among invertebrates, but the explanation for their extraordinary skills may lie elsewhere. It seems that these animals think, literally, outside the box of the brain.
Octopuses have hundreds of suckers, each one equipped with its own ganglion with thousands of neurons. These "mini-brains" are interconnected, making for a widely distributed nervous system. That is why a severed octopus arm may crawl on its own and even pick up food.
Similarly, when an octopus changes skin color in self-defense, such as by mimicking a poisonous sea snake, the decision may come not from central command but from the skin itself. A 2010 study found gene sequences in the skin of cuttlefish similar to those in the eye's retina. Could it be: an organism with a seeing skin and eight thinking arms?
Posts
No comments:
Post a Comment