The team found that walnut shells are composed of a previously unknown cell type—dubbed the "polylobate sclereid" cell—which sports irregular lobes with many different concave and convex contours. These fit together in an intricate and remarkably strong pattern, with each cell surrounded by an average of 14 neighbors.

Are nut shells good for anything?

Use them in the garden

Nutshells contain nutrients that your garden will love you for, but that's not the only way they're handy. Did you know that pistachio shells are great at helping with drainage? Put them in the bottom of your flowerpots to help prevent water logging.

Are nut shells made out of wood?

Not exactly, but peanut shells have quite a bit in common with wood. Both wood and peanut shells are made up primarily of cellulose and lignin. ... Industry extracts the cellulose from plants to manufacture everyday products like paper, paperboard, nylon, and cellophane.