Spiders have very strong silk, but it's difficult to obtain commercially. We can gather silk easily from silkworms, but its not as strong as spider silk.
Very interesting article at discovery.com about injecting dna from a spider into silkworms to create stronger silk more easily.
This is a signpost to the future. More and more of our products will be made this way. Chemical factories could be replaced with vats of bacteria churning out desired chemicals much easier, safer, and more environmentally friendly.
Do you think this is a good thing?
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