Is Silk actually Worm Spit?

What are Silkworms? How do Silkworms make Silk? How much spit does it take to make Silk? Thank you for being a subscriber! Please leave a great review right here in the app, and you might hear it on an upcoming episode! Get official Who Smarted? Merch: tee-shirts, mugs, hoodies and more at www.WhoSmarted.com