According to Curiosity.com, the human body grows steadily from birth to late teens, at which point the skeletal system has fully formed. However, a few studies have found that both the pelvis and skull continue to grow after the teen years.
A study done by the University of North Carolina found that the pelvis continues to grow between the ages of 20-79. The pelvis was found to widen 1 inch, averaging a 3-inch increase in waist size. Researchers at Duke University revealed that similarly to the pelvis, the skull continues to grow and change until a person dies. These changes include a shifting forward of the forehead, which results in a widening of the cheekbones.