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Scientists have turned to genetic manipulation to produce spider silk from silkworms. The researchers were able to propagate silkworms that produced spider silk, which is six times stronger than the Kevlar fiber used in bulletproof vests. Spider silk is said to be the next big thing in making sutures, garments, and bulletproof vests. Previous attempts at producing such silk involved genetically modifying goats which then produced milk containing spider silk proteins. Silkworms have been used before too, but this attempt has been the most successful so far.