Displaying items by tag: Precautionary Principle

Several years ago, while working on my undergraduate degree in biology, I took a course in vertebrate zoology. This course required the rote memorization of hundreds of traits about both extinct and extant (still living today) families of vertebrates, from the solemnly repulsive hagfish to our familiar and celebrated mammals. One of the traits that was listed for our memorization was that birds do not possess facial expressions.