In a first, genetically modified silkworms produced pure spider silk
The feat is a key step toward someday mass-producing the strong, lightweight fiber
![A photo of a silk worm next to a large collection of silk strands.](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2023/10/092923_si_spider-silk_feat.jpg?fit=1030%2C580&ssl=1)
Scientists have engineered silkworms to spin spider silk, an exceptionally strong and stretchy natural fiber.
Baishiya/Flickr (CC BY-SA 2.0)