Spiders are very interesting, don't you think? One interesting fact about spiders is 
that they are not insects, they are a group of animals called arachnids. Ticks and 
scorpions are also arachnids. Another fact is that the strength of the web is based 
on the species of spider. The Golden Orb Weaver has silk stronger than steel. The 
last fact is that they are invertebrates*. Instead of bones, they have an exoskeleton, 
which they molt (shed) every so often. In conclusion, spiders are very fascinating.  

*to have no backbones