Arachnids have four pairs of jointed legs, two body sections and simple eyes. Arachnids are aggressive predators and include spiders, scorpions, mites and ticks.
The Deadliest Spiders Quiz
Most spiders get a bad rap, but some can cause serious harm. See how much you know about the deadliest spiders with this quiz at HowStuffWorks. See more »
10 Myths About Spiders
Spiders often incite fear, worry and more, but really these creatures are typically benign. Learn 10 myths about spiders at HowStuffWorks. See more »
Do we really swallow spiders in our sleep?
Spiders generally have no desire to be eaten, but accidents happen. Learn if we really swallow spiders in our sleep at HowStuffWorks. See more »
Do daddy longlegs really have powerful venom?
The daddy longlegs generally doesn't top lists of the scariest spiders. But should it? Learn just how poisonous daddy longlegs are at HowStuffWorks. See more »
Do black widows eat their mates?
Female black widow spiders have a reputation for eating their mates. Learn more just how cannibalistic black widows are at HowStuffWorks. See more »
10 Amazing, Beautiful, TERRIFYING Spiders
Spiders have been on Earth 380 million years. Here's HowStuffWorks' list of 10 amazing, beautiful and terrifying spiders. See more »
How to Identify Black Widow Spiders
How to identify Black Widow Spiders. Visit HowStuffWorks to learn more about how to identify Black Widow Spiders. See more »
The Ultimate How Spiders Work Quiz
Spiders are fascinating but frightening creatures for most people. Take our quiz to learn more about what makes spiders such an impressive little animal. See more »
The Ultimate Spider Quiz
They may not be dangerous, but there's something about spiders that freaks people out. Take our quiz to learn more about spiders. See more »
Arachnids include spiders, mites, ticks, harvestmen, chiggers and scorpions. Learn more by viewing these arachnid pictures. See more »
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