All spiders produce silks, and a single spider can produce up to seven different types of silk for different uses. This is in contrast to insect silks, where most often only one type of silk is produced by an individual. Over the 400 million years of evolution, spider silks may be used for a number of different ecological uses, each with properties to match the function of the silk (see Properties section). The evolution of spiders has led to more complex and diverse uses of silk throughout its evolution, for example from primitive tube webs 300–400 mya to complex orb webs 110 mya.
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