Scientists genetically engineer mutant silkworms to spin silk nearly as strong as spider silk. Spider silk, as you probably know, is stronger than steel. Producing silkworms that have been domesticated for centuries, able to make silk of the same quality seems like a really good thing. Think Kevlar vests that weigh as much as a t-shirt.
The article links provides a link to another that is well worth looking at. I know, spiders are scary! But this is still really cool.