In addition to all of your other identities— urban, rural, Christian, atheist, African-American, first-generation, introverted, immunocompromised, cyclist, gun owner, gardener, middle child, whatever panoply of nouns and adjectives and allegiances describes you—you are also this: a gnathostome. A gnathostome is a creature with a jaw, a characteristic you share with all other human beings, plus macaques, zebras, great white sharks, minks, skinks, boa constrictors, and some sixty thousand other species.
I learned this fact about myself (and you) from one of the more unlikely books I lately committed to reading: “Teeth: A Very Short Introduction,” by Peter S. Ungar, a professor of anthropology at the University of Arkansas. Like its subject, “Teeth” is both a freestanding entity and part of a larger body: the Very Short Introduction series, a project…
