Skleton Challenge

Can we draw inspiration from animal skeletons to build composite porous materials that are light and resistant?

Figure 1: The photo shows a section through the skeleton of a barnacle, which has a structure similar to cardboard: two hard layers bound by a cushioning layer in between. Credit: Emilia Jarochowska

Animal skeletons are scaffolds made of minerals, but they form inside of a living body. They have to be light and easy to modify, but at the same time strong and resistant to damage. How can we model the perfect structure and density for a given type of stress that acts upon the skeleton? Can we draw inspiration from animal skeletons to build composite materials that are light and resistant?