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."
Experience the California Gold Rush. Examine gold in its pure and refined forms. And find out how gold has shaped civilizations throughout history.
How does gold form and what does it take to extract it from the earth? You'll find everything from colorful field guides to tales about the quest for gold in this list of kid-friendly titles.
The effluent lake in Fountain Hills makes for a spectacular fountain—one that can erupt up to 560 feet. But what quality of lake is created with the use of recycled wastewater?
One of the benefits of living in California, according to this 9th-grader, is inhabiting a environment that provides a critical link between humans and the Pacific Ocean.
This 10th-grader from New York first became fascinated with bats when she observed their "magical movements" in Israel's Negev Desert as a young child. Trek with her to Ontario to study their behavioral ecology.
Search a database with more than 8,300 reptile species. Learn about amphibian biology and conservation. Review the evolutionary history of squamates. And find hands-on science activities.
Three of the most catastrophic volcanic eruptions in geologic history occurred at a place now visited by nearly four million people a year: Yellowstone National Park. The magma chamber responsible still lies beneath, and continues to steam, heat, and shift the park landscape. Science Bulletins talks with the geologists regularly monitoring these disquieting signals to understand where this active region lies in its volcanic life span.
Explore the McLaughlin gold mine in Northern California. See the first metal coins, which were created in the Middle East around 600 BC. And investigate the properties of gold.
How much can you reduce your carbon dioxide emissions? Is it worth it? Learn how simple choices multiplied by everyone in your community can make a big difference.