Another example of apparent design can be found in loggerhead turtles. These animals not only have a compass-like sensitivity to the earth’s magnetic field, but in order to successfully migrate, must also be sensitive to the angle of declination of the magnetic field lines. Did this amazing ability evolve by unguided processes or is it an example of engineering design? Biology cannot answer this question, but it is possible that information science can.
Finally, consider Trilobites. These organisms have been extinct for 250 million years, but studies of their fossilized eyes reveal a lens made of two transparent materials: calcite and chitin, each having a different index of refraction. After passing through the calcite portion, the image must be corrected by the chitin portion in order to be sharply focused on the eye’s photoreceptor cells. To design such a lens today, an optical engineer would have to apply Fermat’s principle, Abbe’s sine law, Snell’s laws of refraction and the optics of birefringent crystals. Is this an example of an unguided evolutionary process or an example of engineering design? Think about it and decide for yourself.