Spider's silk is lighter than cotton, yet ounce for ounce they are stronger than steel. Dragline Silk is the strongest of the seven silks that spiders spin; it is tougher and more waterproofthan silkworm strands which are commonly used for clothing. If enlarged to the size of the football field, a web of a dragline silk can stop a jumbo jet on flight!
--Awake, Jan. 2008, pp. 24
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