Spiders are amazing creatures. There are more than 38,000 known species of spiders, and a human is said to never be more than 3 meters away from a spider. Spiders are NOT insects. Spiders have eight legs and two bodily sections, while insects have six legs and three bodily sections. Some spiders are poisionous (and deadly), but most are not. All spiders produce silk, which many species use to spin webs and capture their prey. The largest spider is the Goliath birdeater. It can grow to be 28 centimeters wide and have fangs that are 2.5 centimeters long.