some true spidey sense

i heard on the news today that there are enough spiders in the midwest that i'm never more than 3 feet away from one.

in the paper today:
- on an equal weight basis, spider silk is twice as strong as steel
- spiders have 48 "knees": 8 legs with 6 joints on each
- a jumping spider can jump up to 25 times its own body length
- there are more than 30,000 kinds of spiders worlwide
- most spiders have 8 eyes, but poor vision
- a spider's heart can beat up to 200 times a minute