Silk by Aarathi Prasad

I have heard it said that scientific study can take away a sense of wonder because science reduces a miraculous organism into mere mechanical parts. I have never found that to be true. Perhaps I find miracles in mechanisms. But however I looked at them--these insects, their metamorphosis, their silken threads--all were still miracula, true "objects of wonder." Over centuries, the transformation of insects through metamorphosis had proved so inexplicable a mystery, and the silks that came of it so extraordinary, that women and men have studied it with the kind of fervor that cost some their eyesight, others their health, and a few their lives. And yet it is an obsession that persists.

Silk is kind of weird when you think about it. That stuff comes from a bug's butt. But there's no arguing with results: few fabrics are as lustrous, or soft, and, as Aarathi Prasad describes in her book about the natural history of silk, strong: for a long time it was even used to stop bullets. Human beings have long known the value of silk, as attested by the fact that the silk moth, Bombyx mori, is one of the earliest known domesticated animals we have, going back thousands upon thousands of years. The humble silk moth lost its ability to fly in the process of domestication, and now exists, like cows and chickens, almost entirely at our service. But there are other silks than moth silk, and the most interesting parts of Prasad's book are actually about the attempts to farm silk from other organisms, most of which met insurmountable challenges: the fine hairs of certain mollusks, and the ultra-strong silk of spiders. (As it turns out, it's harder to farm spider silk at scale because, unlike moths, spiders like to eat each other.)

Prasad's book is organized by personality, rather than chronology. Each chapter highlights, more or less, an important personage in the production or understanding of silk. There's Maria Sibylla Merian, whose artistic renderings of silk moth cocoons helped us understand the transformation process of silk moths for the first time. There's René Antoine Ferchault de Réaumur, whose experiments with farming spider silk were so popular they were translated into Chinese for the emperor. And then, toward the end of the book, there are the modern researchers who are using the technology of silk to build stronger fabrics and materials for the modern age, including those using gene-splicing technology to produce spider silk in goats. What this organizing strategy lacks in chronological sense--I had a hard time separating out the where and when, because the chapters jump around in time as well as place--it makes up in human interest. For Prasad, the story of silk is the story of human beings, and specifically those obsessive scientists and naturalists who advanced our knowledge of the production and nature of silk--as opposed to, perhaps, a broader sense of the larger social dynamics of the silk trade.

What I enjoyed most about Silk is the way that it sits at the nexus of several different types of book: it's a history book as well as a natural history book, and it balances history and science well. Prasad is a skilled writer, and the book felt breezy and readable--for the layman. And it left me wanting to get my hands on a pair of spider-silk socks.