Want to learn more about the legged and legless lizards known as squamates? You'll find everything from colorful field guides to tales of unusual behavior in this list of kid-friendly titles.

Experience the California Gold Rush. Examine gold in its pure and refined forms. And find out how gold has shaped civilizations throughout history.

What are squamata? Why is the term "cold-blooded" incorrect? And how does chemoreception work? Find out with this glossary—from "adaptation" to "vertebrate."

This 11th-grader discovered a dramatic drop in the water quality along Utah's Spanish Fork River. Follow along as she investigates the source of this decline.

With this 11th-grader from Iowa, investigate a former munitions and nuclear weaponry plant that was placed on the EPA's Superfund list in 1989 and test the water quality of neighboring creeks today.

Because professional observatories can rarely offer the large blocks of time needed to search for variable stars, this 12th-grader from Maine outlines a system for using amateur equipment.

Find out how this 10th-grader from Oregon was able to take the back-and-forth motion he observed in Jupiter's moons and use it to figure out their circular motions.

Meet a 12th-grader from Louisiana who's seeking an environmentally friendly solution to animal waste. His motivation? Ten family cats and the four smelly litter pans he's charged with cleaning!

How do the many trees and shrubs that live at the bottom of dry riverbeds survive flash floods? Investigate the answer with this 7th-grader from Arizona as he monitors a neighborhood wash.

What is the gold standard? How does an alloy differ from a compound? And what happens when a metal tarnishes? Find out with this glossary from "alloy" to "volume."