Silk of the Darwin's bark spider is twice as strong as other spider silk due to extreme extensibility combined with high strength.

Man-made structural fibers are generally coils of simple, homogenous strands. In contrast, spider silk fibrils are constructed with alternating nano-segments that are either extremely flexible (amorphous glycine-rich matrices) or extremely strong (crystalites made of anti-parallel pleated beta sheets). Dozens of fibrils come together to form each thread. As a result, the fibers are nearly as strong as Kevlar yet much more stretchable and tough.

Last Updated October 16, 2016