Got wrinkles? You might be quick to blame sagging skin, but Duke University Medical Center researchers recently discovered that face wrinkles may have more to do with underlying bone structure than aging skin.

When they looked at head scans of 100 people -- half of whom were under 30, while the other half were over 55 -- they found that as a person ages, their forehead becomes more prominent, while the cheekbones become less pronounced. Facial bones also tilt forward, and these three things combined means less support for skin.

This research may lead to plastic surgeons developing new techniques for face lifts that target the underlying bony structures rather than only the soft tissue of the face. While that may sound like a more difficult surgery, plastic surgeons say that it may actually be less invasive and safer than today's methods.