Tag Archives: Bernoulli’s law

The Birds

While waiting for the bus, now that it’s light out that early, I like watching the birds. They have complex interactions and so many different styles of flying. They have ways that are a closed book to our species. From human eyes they seem so playful that it’s difficult to believe they participate in a struggle for survival. Evolution tells a different story, of course. Living not far from the great human nest of Newark’s Liberty Airport, it’s not unusual to see an engineered flying machine soaring high over their avian heads. Which, I wonder, are the better fliers? Birds, after all, evolved. Flying wasn’t planned, as far as we can tell. Although not so much around here, some birds don’t even fly.

I once read—many years ago and I can’t recall where—that if a person were to fly they would need an enormous chest to beat the very large wings they’d need for lift-off. Birds, apart from being naturally aerodynamic, have hollow bones which make them a touch fragile, but less tied to gravity. Our planes and jets, unlike the escape vehicle in Chicken Run, don’t flap. Bernoulli’s law keeps them aloft, along with some meticulous engineering and heavy fuel consumption. Humans may imitate nature, but they supersede it when they can. Still, I have to wonder why, if birds were a special creation as our literalist friends claim, God didn’t make them more like a plane.

Holding your wings out stiff all day, I’ll allow, would get pretty tiresome. Still, if you’re designing a critter to fly you might as well go with the best parts available, right? If not, I’m going to have a talk with my mechanic and ask for some of my money back. Birds, for all their charm, are very good illustrations of evolution at work. Dinosaurs taking to the air is so poetic that it has an organic feel. Flying is a great way to escape your land-bound predators. That step from long leaping to flying may be a doozie, but it seems to explain the shape of birds better than any intelligent design. Among bipeds, though, only one claims the place of being god-like in shape. Having said that, there are some flaws that a good biomechanical engineer might address. But then, who said God majored in engineering? When I went to college I was firmly under the impression that he’d majored in religion. And that, as many engineers might suppose, is for the birds.