Natural Changes in Living Things Are Like Twiddling Knobs


“Complex machines,” writes Dr. Don Batten, “often have lots of knobs provided for adjustment: think of a jumbo jet, a television set or a DVD player. With a radio set you can twiddle the knobs to tune a different station or increase the volume or adjust the tone. But you can twiddle the controls on your radio as much as you like, it won’t change into a TV set.”

“The natural changes we see in living things are like twiddling the knobs on a complex machine: they can fine-tune the settings, but cannot create something completely new.” To continue reading, go to “Twiddling the knobs.”

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