Researchers at the University of Cambridge have discovered that much of the mineral content from which bones are made is actually in the form of a goo, which sits trapped between tiny crystals, lubricating them—and, crucially, allowing for small movements. It’s that flexibility that stops our bones from shattering.

The goo is made from citrate—a by-product of cell metabolism—mixed with water. It’s a viscous fluid, and a thin layer of it sits between the nanocrystals—made of calcium phosphate—which make up the solid aspect of our bones. There’s enough of it, though, to provide slip between the crystals, which absorbs the energy of impact that would otherwise shatter a solid piece of the crystal bone structure.

Understanding this could actually lead to new treatments for osteoporosis.

Also, possible rehabilitation for Mr. Glass.

Via Gizmodo.