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 ...

To help you find the best pairs of pajamas for an optimal snooze, I’ve slept my way through many pairs — including an old-fashioned nightgown and the slinkiest silk slip. You’ll read about ...