A Tiny Darwin's Bark Spider Shoots a Silk Line Over 25 Meters to Begin Spinning Her Giant Web

Meet the Darwin’s Bark Spider, Weaver of the World’s Largest Webs

Darwin's Bark Spider Shoots Webs up to 80 Feet Long

The Silk Road - The amazing Darwin's bark spider

At 25 Meters In Width, Darwin's Bark Spiders Spin The World's Largest Orb Webs

UVM Research: Searching for Darwin's Bark Spider

SOLVED: The silk of Darwin's bark spider (Caerostris darwini), named after the naturalist, Charles Darwin, is the strongest biological material ever discovered (see the photo). In fact, many of the mechanical properties of the silk supersede those of steel. While the Young’s modulus for steel ( 2.00 × 1011 N/m2) is larger than the silk (1.15 × 1010 N/m2), the density of the silk is much less, such that the strength-to-density ratio of the silk is about five times that of steel. Consider a 10.0-c