Cells have an internal skeleton that maintains their structure and also drives their movement. Known as the cytoskeleton, ...

It's no coincidence that our bodies feel a little creakier as we age. The trillions of cells that make up our skeleton age too, and some change in ways that weaken the very structure of our bones.

The major resemblance between teeth and bones is what they're made of: hard tissue composed of minerals, such as calcium, phosphorus, fluoride and magnesium. On a molecular level, these minerals form ...