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Really? I've never seen one of those pictures. We did have pictures, that a member took and posted, of a hummer being caught and eaten by a Praying Mantis.
Tensile strength of steel means nothing but the resistance to breaking with a steady straight line pull. Any vector from that state, such as shearing, all bets are off. Also, in order to have a tensile pull, the thread must be firmly attached. In the case of spider webs, it would depend on glue being stronger than the web.
The success of webs is dependent on the speed of the spiders attack. Larger insects and bees, routinely escape from webs, if the spider isn't available or fast enough.
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The descent of man ~ Nixon, Friedman, Reagan, Trump.
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