As defined by William J. Cairney in Evidence for Faith prescience is “the occurrence, in Scripture, of accurate statements reflecting in-depth knowledge of scientific concepts far before mankind had laid the technological base for such things to be known.”
Cairney points out of course that prescience in the Bible isn’t an end in itself. Such evidence only increases our knowledge of Scripture and appreciation for the God revealed in the Bible.
Other “unclean” animals are marine animals without fins or scales, usually bottom-feeders; they eat fecal matter to put it nicely. Rodents were unclean – enough said. But they would have been accessible and likely tender, but they’re naturally carriers of some of the nastiest diseases man has ever faced. Don’t eat, don’t touch, and surely you don’t want to be bitten!
Turtles and lizards were on the “naughty” list too. Young kids who have these animals as pets sometimes get Salmonella! Yay! If they’re taken from stagnant water or contaminated water, they’re a source of disease inducing micro-organisms.
Basically, all the “unclean” animals can lead to disease in handling and eating if not properly kept. The clean animals were quite chill in this regards.
Cairney also shares how some of the laws for keeping and growing plants also spared one’s self from disease-causing micro-organisms.