Scientists have conducted experiments to study the strength of spider thread. The results were striking: despite the fact that the web is very thin and light, it turned out that in nature it is difficult to find a material that could compete with her in strength. For example we took the climbing frame and steel wire of the same thickness, and it turned out that the thread is much stronger than the wire. In addition, it is elastic and can be stretched a third of its length.
The strength of the web is striking: if it is to pull in a continuous thread, its strength is 260 kg just one square millimeter! Thread silk pencil-thin can stop a Boeing 747 flying at full speed. People still can not create this material, despite all technological advances.
Sticky web is the spider's house; and a trapping network. If some insect accidentally caught in the web, it sticks to it. The spider rushes to the insect, wraps his spider thread into a tight cocoon. Inside this cocoon production turns into a liquid mass, which eats the spider. Eat spiders can only liquid food, as the oral aperture spiders in the form of tubes and very narrow. Therefore, oputa sacrifice cobwebs, spiders inject into her special substance that acts as a digestive juice, damaging the tissue. Then they suck the victim, leaving only an empty skin. This digestion is called extraintestinal.