A World Wired Before the Sky
The question has nagged dog owners for years: a helicopter thunders low over the garden, every human head turns, and the dog carries on sniffing as if nothing happened. [1] The answer, according to Peter Seligman, writing from Melbourne, Australia, is not stubbornness or deafness. It is development. A dog that never met objects at different heights while its brain was still laying down visual wiring may simply lack the circuitry to register an aircraft overhead at all.
The foundation for that claim comes from the work of David Hubel and Torsten Wiesel, whose studies of how the visual cortex develops earned the 1981 Nobel Prize in Physiology or Medicine. [1] Working extensively with kittens, they found that removing certain visual cues from an animal’s environment during the period when the brain wires the nerve routes carrying signals from eye to brain had permanent consequences. Once development was complete, the missing ability did not come back.
The most striking demonstration involved striped surroundings. Kittens raised in a box lined only with horizontal lines could not see chair legs or other vertical objects when placed in a normal environment. A dog’s blindness to the sky, in Seligman’s view, is the same kind of gap — an absence written into the brain by an absence in the world.
The Sky That Never Registered
Peter Seligman, writing from Melbourne, Australia, draws the dog’s conclusion directly from the kitten evidence. [1] If a dog was not brought up in an environment containing objects at different heights, its brain would potentially never be able to recognise that there is an aircraft overhead.
There is a second layer to the problem, and it is acoustic. The modern world is a cacophony of motorised and industrial sound. Against that backdrop, Seligman argues, the aeroplane would likely blend into the background. Even a brain that could see the thing might never be prompted to look, because the noise arrives as part of the general hum rather than as a signal worth chasing.
Not every observation fits the pattern. Seligman describes a kitten that leapt up at a jumbo jet — and missed. He also reports seeing a cat catch a bird in mid flight, beginning its leap in anticipation of where the bird would be.
