“During the process of making a web the spider will use its own body for measurements, a very practical and ergonomic design feature of any web. This will allow the spider to move quickly around its own web with very few faults.”
We Scour the Web, so You Don't Have To!
This is a quite interesting study on the effects of various drugs in the web-making abilities of spiders.
http://www.youtube.com/watch?v=sHzdsFiBbFc
That was pretty cool. I didn’t know spiders recycled.