Following is a transcript of the video. Narrator: Humans have been making silk for centuries. It's a coveted textile for gowns, sheets, and robes. But why is it so expensive? Silk is the product ...

and the final product can cost 10 times as much as regular silk. So just how is it made, and what makes it so expensive? Phan Thi Thuan's family have been making silk for generations, growing and ...

These intricate structures, created entirely from silk, allow spiders to capture prey, build shelter and even communicate. Spider webs are shockingly durable, made with materials that, gram for ...