
Discussing the emergence of the Cro-Magnon, Bryson says:
"[T]hese Cro-Magnon people were identical to us. They had the same physique, the same brain, the same looks. And, unlike all previous hominids who roamed the earth, they could choke on food. That may seem a trifling point, but the slight evolutionary change that pushed man's larynx deeper into his throat, and thus made choking a possibility, also brought with it the possibility of sophisticated, well-articulated speech.
Other mammals have no contact between their airways and esophagi. They can breathe and swallow at the same time, and there is no possibility of food going down the wrong way. But with Homo sapiens food and drink must pass over the larynx on the way to the gullet and thus there is a constant risk that some will be inadvertently inhaled. In modern humans, the lowered larynx isn't in position from birth. It descends sometime between the ages of three and five months - curiously, the precise period when babies are likely to suffer from Sudden Infant Death Syndrome. At all events, the descended larynx explains why you can speak and your dog cannot" (22).
Hence the picture at the start of this post. While my beloved Spooky-dog has many talents, well-articulated speech is not among them. (Then again, she can take down any mole that dares encroach on her property far more quickly than I can, so there's always a trade-off, I suppose.)
At any rate, it seems that at some point in human development, the ability to form speech was worth the possibility of choking. There's a lesson in this beyond realizing that your mama was right and you shouldn't talk with your mouth full. We'll discuss that lesson (lessons?) Monday night as we watch "Hush."
See you there!
PS - because it's the time of year for silly vampire articles, you may want to check this out. A professor in Kansas sets out to debunk vampire myths - including why Buffy couldn't really slay a vampire.
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