1. These layers are not a uniform thickness, but are instead engineered to create a new material.

2. The thickness and color of tree rings can also reveal clues about the historical climate.

3. Resolution refers to the thickness of each layer of material laid down as an object is being built.

4. These numbered markers are based on the average thickness of facial tissue for an individual of this race and gender.

5. Low temperatures, which may also increase the thickness of joint fluids, can also contribute to the pain that many experience.