Tuesday, April 14, 2015

Steel can't stand up to a Spider! Silk machines!

The silk of a spider has more tensile strength than a thread of steel of the same weight.

Spider silk is one of the toughest biological materials know to exist.
The toughness comes from a combination of strength and flexibility. While spider silk is about five times as strong as a comparable amount of steel, it is weaker than certain man
-made materials such as Kevlar.

However, spider silk can stretch by up to five times its relaxed length when under pressure and this makes it tougher than almost every synthetic material ever created.
The strongest type of spider silk is the kind know as dragline silk, which is used as the rim and spokes in web construction. Spiders can spin up to seven different types of silk for different purposes, including capturing and immobilizing prey, protecting eggs and young, and as a method of escape.

Newly hatched spiders may use a parachute made from a few threads of silk as a means of dispersal in the wind.

If you sit on a shoul in an Arkansas river. At sunset you will see hundreds of spiders with parachutes in the wind. They are all spaced equally and form a flying net sometimes yards long. It's really cool to watch as deer hunting time comes to a close. Time to get back to camp and eat something myself. 

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