Did you know that all of the mined gold in the world could easily fit inside your school's gym? Find out what it takes to turn this precious metal into trophies and jewelry.

With an entire habitat in front of them, how do scientists actually inventory the entire site? Find out their tricks of the trade; then apply the principles to your own small site.

Chances are you know that butterflies and moths go through a metamorphosis. But did you know that the same is true for silverfish? Learn more about the two types of arthropod metamorphosis.

When you look down at a spider crawling on the sidewalk, do you know what you're looking at? Find out with this illustrated guide to the parts of a spider.

A twig is just a twig—or is it? You can identify a plant, tree, or shrub just by closely observing one small part of it. After this activity, you'll never again dismiss a twig.

Can you name the mystery arthropod named for its hundred-some legs? More important, do you know what physical and behavioral characteristics it shares with a shrimp or honeybee?

Earth's climate is changing, and according to scientists today's kids will bear the brunt of the potentially damaging affects of a warmer world. Find out how scientists are preparing now for the potential negative consequences.

"Greenhouse effect" and "global warming" are becoming household phrases but how, exactly, are they linked? Explore the interconnections and consequences of climate change.

What's the size of your desk in relation to your teacher's? Or to the chalkboard at the front of the room? Hone your mapping skills with this classroom activity.

Some scientists believe the fate of humankind was changed when humans first began to tame the wild horse. Learn more about how horses have shaped our world.