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!

Decades after the fictitious Martian visit in the War of the Worlds broadcast, Grovers Mill, New Jersey, is undergoing a very real reconstruction. Investigate its environmental impact with this 9th-grader.

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.

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.

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.

Follow mermaids around the world and throughout history to see first-hand how cultures share and reinterpret mythic creatures.