As the perfect hero, Herakles has very nearly bypassed the normal topography of human experience by becoming a cleft-chin cliché. Everyone knows the half-god Greek from his heroic undertakings.

There’s a lot you can figure out with DNA.” said Sean Salemink, a 23andMe user out of Iowa City. Originally born ...

It should be in proportion with the tongue and chin. The lips should be fully formed ... Infants with CP may have a tongue that falls into the cleft and obstructs the airway.