And worms REALLY made this?

This is a shallow depth-of field shot of a silk painting that I did last year with my sister Jessica.  It was a fun activity.  Silk takes paint really well, and creates these beautifully muted colors.  We used stamps to create more defined images.  I cannot comprehend how worms make silk.  It is just a mystery to me that something so beautiful can come from a bug.

Nikon D90
Nikkor 18-105mm f/3.5-5.6
50mm - ISO 400
1/50s - f/1.8