Nexia Biotechnologies has managed to genetically modify goats to express the proteins for spider silk in their milk. Spider silk has a lot of advantages, but as the Nexia page notes isn’t used very much because it’s a bit hard to effectively manage spiders in large enough numbers to get decent yields.
A major application of this technology is military, of course — think on the order of military vests that are more bullet resistant than kevlar while only weighing a fifth to a tenth of current vests.
The big question now is whether there is anything from science fiction novels that isn’t going to become reality over the next few years (okay, FTL travel isn’t going to happen, but aside from that, it looks like smooth sailing).
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