At the farmhouse kitchen sink, looking out a window at the front yard, I saw suspended, hanging in air, a long, thin twig and slender leaf. Slight, intermittent breezes moved the dangling tree debris about, made it obvious against the gray sky. It hung about head-height above the lawn, bobbed up and down and around a few inches.
I guessed the twig was attached to a very thin thread of spider or caterpillar silk. But with no tree branches at least 30, likely 40 feet above the twig, this was a very long thread. The length and strength of this nearly invisible, whisker-thin strand of spiral protein impressed me. To stretch so far, to remain whole, tugged by breezes, tiny coiled-coil protein fibers, with amazing strength and flexibility.
Next day, out the kitchen window, I saw the twig was still bobbing slightly at head-height. This strength and persistence further impressed me.
Feet planted, I started to take photos. Suddenly, the twig flew at me — swung directly at me, forced me to bend back. I almost fell, stumbled sideways, tried to set my feet, snap another photo. I had to wait for the twig to stop swinging, and hold position long enough to snap the shutter.
I managed to click the shutter twice, when a new breeze blew the twig at me again — this time more vigorously, and I had to step backward. The twig blew higher, for longer time while I tried snapping photos of an erratic moving object.
Eventually, wind relaxed, twig returned to hang over the bare patch, I tapped the shutter button again. In the vigorous wind, I thought the thread had stretched and lengthened. But surprise — its height hardly changed! Evermore impressed by the tenacious strength of almost-invisible spiral biostructure.
Suddenly, a third time, the twig twirled toward me. Forced to evade it, I stopped snapping photos. Three times wind blew this bobbling body straight at me, forcing me to hobble and stumble around to get my photos.
Astonished the almost invisible thread didn’t break, I assumed the force of the wind had stretched the slender strand of silk, lengthened its coiled proteins, by inches, even a foot. I expected the twig to swing back closer to the ground. But the wind passed, the twig sank, slightly low at first, then slowly rose back head-high, as if the thread stretched, then recoiled and tightened.
Is a spiritual intelligence embedded in this land? Is this ghostly trick or treat by a twig a Halloween gift from a poltergeist? A mystery message from an Earth Spirit? My respect deepened for spiders and caterpillars. Amazing a single strand of spider thread kept twig and leaf suspended head-high in two cool, moist, unsettled days.
A spider web preserved in amber, thought to be 110 million years old, shows evidence of a perfect “orb” web, the most famous, circular kind one thinks of when imagining spider webs. An examination of the drift of those genes thought to be used to produce the web-spinning behavior suggests that orb spinning was in an advanced state as long as 136 million years ago. — Wikipedia
Unlike the case of the largely available silkworm silks, large-scale spider farming and synthetic production of spider silk still remain to be achieved, due to its complex structure and the territorial and cannibalistic nature of spiders. Moreover, naturally spun fibres, obtained by forcible spinning, harvesting or extracting spidroin from glands, have reduced mechanical characteristics with respect to naturally-spun ones, due to the CO2 anaesthesia of spiders and the consequent loss of active control of their silk spinning. Research to improve the mechanical, conductive or magnetic properties of spider silk has been limited. This is due to the difficulty of developing an adequate spinning methodology, balancing extrusion, drawing, yield and purity. … Attempts to improve or modify the mechanical, magnetic and electrical properties of spider silk have been reported, using techniques such as melt-spinning, templating, powder coating, atomic layer deposition and iodine doping, but they remain to be adequately perfected, especially at large scale, using naturally spun spider silk fibres.
The best mechanical performances are observed for the samples after the first collection. The second collection does not show mechanical enhancement with respect to the first or to RS [control], probably due to a physiological spider weakening during segregation, since neither additional food nor water were available during the experimental period, except SWNTs and graphene dispersions. In the cases marked with an asterisk in Figs. 5b,c, the second collection was impossible since the corresponding spiders died. Note that spider 5 died after the first treated dragline silk collection, but was able to spin the silk with the maximum increment in mechanical performance, whereas spider 7 spun the silk with the highest absolute values and survived.