Arachnids have four pairs of jointed legs, two body sections and simple eyes. Arachnids are aggressive predators and include spiders, scorpions, mites and ticks.

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Several New Species of Tarantula Found High in the Andes

A Columbia University scientist stumbled upon the first of seven new spiders while hunting for local frogs.

New Tick Species Appears in U.S. for First Time in 50 Years

The Asian longhorned tick has shown up in six states so far, and nobody knows how it got here.

Chippy, Sniggy and Tiggy: Cutest Goblin Spiders Ever?

The newest goblin spiders hail from Sri Lanka, and they're named after fanciful and fictional goblins and brownies.

It's a Bird! It's a Spider! It's Pelican Spider!

The pelican spider would just as soon eat another spider as look at one.

She Mates, She Kills — and That's OK With Male Brown Widows

Male brown widow spiders stubbornly court the oldest females they can find, though younger females are more fertile and far less dangerous.

Unique Silk Physics Keeps Dangling Spiders From Twisting Wildly

Spider silk adds another notch to its belt of amazing properties.

Each Year Spiders Eat Millions of Tons of Food More Than Humans

Spiders not only eat more meat than humans every year, they also spend a lot of time getting eaten themselves.

Spiders May Go Extinct From Oversharing

Sharing's generally regarded as a desirable behavior among humans. But for some social spiders, it can be the death of them.

Sometimes Spiders Go Vegetarian, Scientists Find

A new study documents worldwide instances of arachnids turning to plants and vegetation for nutrition and sustenance.

Newly Discovered Trap-Jaw Spider Captures Prey With Astonishing Speed

Researchers had to use special high-speed cameras recording at up to 40,000 fps to even witness the 'lightning speed' chelicerae jaw structures snapping shut.

Tiny Spider Lover Waves Hello When He Wants to Mate

An oar-shaped protrusion of microscopic hairs on the legs of a grain-sized spider is bringing sexy back to the arachnid kingdom.

Shakira's Moves, David Bowie's Haircut Inspire Insect Names

Publicity ploy or not, many surprising folks have insects named after them.

The Four Most Terrifying Words: Enormous Communal Spider Webs

A million spiders cooperating to spin a web the size of a parking lot? It’s not just a B-movie plot; it’s happening right now.

10 Myths About Spiders

We think we know all about spiders — they spin webs to trap prey; if they bite you, you might die. And if you find one in your house, you should set it free. But what if all these beliefs are a web of lies?

Do we really swallow spiders in our sleep?

Worried about creepy crawlies entering your mouth while you sleep? Relax -- spiders have no interest in being eaten.

Do daddy longlegs really have powerful venom?

With its long legs and goofy way of motoring about, the daddy longlegs generally doesn't top lists of the scariest spiders. But should it? After all, if legends are to be believed, it's one of the most poisonous spiders of all.

Do black widows eat their mates?

It's good to be a little skeptical sometimes. Otherwise, we might believe the moon really is made of cheese or that the world is going to run out of bananas soon. So when people say female black widows eat their mates, we're not biting.

10 Amazing, Beautiful, TERRIFYING Spiders

Spiders have been on Earth a whole lot longer than we have — 380 million years, to be precise — and number more than 38,000 separate species worldwide. Explore 10 of the most beautiful and scary of these arachnids.

How to Identify Black Widow Spiders

Since the black widow spider is one of the more (in)famous species of venomous spiders, it's important to know how to identify it so you can steer clear. This article shows you how to identify black widow spiders.

Arachnid Pictures

Arachnids include spiders, mites, ticks, harvestmen, chiggers and scorpions. Learn more by viewing these arachnid pictures.

What is a spider's silk made of?

Spider silk is five times stronger than steel and twice as strong as bullet-proof Kevlar. What exactly is spider silk, what is it made of and why is it so strong? Find out the answers to these questions and learn other facts about spider silk.

How long can scorpions live without food or water?

Scorpions have been around for 450 million years. But the species hasn't been sustained by a healthy, vibrant diet: This opportunistic eater would rather wait for food to come to it than go out hunting for it. So how many meals does that amount to?

What's the world's deadliest spider?

If looks could kill, bristly tarantulas would be the spiders to watch out for. But violins and hourglasses are far more cause for concern.

Spider Facts

Studies have shown that you're never more than ten feet away from a spider is and one estimate puts you as close as three feet. Check out some more spider facts.

What are chiggers and how do they bite?

If you have ever been out in the woods or an open field in spring, summer or fall, you may have gotten chiggers around your waistband or on your ankles. They leave red, itchy bumps on your skin. Learn more about these arachnids.