http://mocomi.com/ presents Spider facts. 1. Spiders are not insects. They belong to the arachnid family that includes scorpions, mites and ticks. 2. Spiders are found on every continent of the world, except Antarctica. 3. There are approximately 40,000 different species of spiders. 4. Spiders can produce silk which they use to create spider webs and capture prey. 5. Abandoned spider webs are known as cobwebs. 6. Most spiders are harmless to humans but a few species, like the Brazilian wanderer and the black widow, can cause human deaths. 7. The fear of spiders is called arachnophobia. 8. The large hairy spiders that you see in movies and challenge shows on television are tarantulas. 9. The skeleton of a spider is located outside its body. 10. Spiders do not have a nose or ears. They are able to sense vibrations, touch, and sounds through the tiny hair that cover their bodies.  11. Along with their muscles, spiders use their blood pressure as well to move. 12. A female sp