And many scientists think that as people's diets have become less chewy, their jaws have gotten smaller — and that this has led to dental crowding, resulting in dental crookedness and impacted wisdom teeth.

许多科学家认为，当人的饮食变得不那么需要咀嚼，他们的下颚就变小了——这就导致牙齿拥挤，造成咬合不正以及阻生智齿。