This story appears in the May 2019 issue of National Geographic magazine. Charles Darwin was fascinated by the spiders that landed on the H.M.S. Beagle nearly two centuries ago. Spiders don’t ...

Darwin's bark spider silk has been documented by some studies as the toughest biological material ever measured, over 10 times tougher than para-aramid fibers, the material used in bulletproof ...

Darwin's bark spider silk has been documented by some studies as the toughest biological material ever measured, over 10 times tougher than para-aramid fibers, the material used in bulletproof vests ...