For three months in the early 1800s, earthquakes shook two pioneer towns in Missouri—and permanently changed the course of the Mississippi River. Relive that time with this 12th-grader from Wisconsin.

Getting lost "somewhere between North Dakota and Montana" during a family road trip led this 11th-grader from Wisconsin to a picturesque landscape, rich with geologic discoveries.

Millions of years ago, coral and algae thrived in the shallow sea that once covered Oklahoma's rocky, tree-covered hills and grassy plains. Explore the state's geologic past with this 10th-grader.

About 390 million years ago, the warm, shallow Catskill Sea covered New York State. As the water retreated, it left layers of sedimentary rock and fossils, as this 12th-grader discovered.

The area surrounding the Huntington Formation is very rich in geologic history, yet it is undocumented and hasn't been mapped in detail. But that didn't stop this 11th-grader from Idaho from surveying its terrain.

After 200 years and the mining of 106 million tons of iron, the Cornwall iron mine was closed. Yet, as this 10th-grader from Pennsylvania argues, the site's geologic importance is far from over.

Traverse the geologic history of Pikes Peak and the southern Rocky Mountains—from Precambrian foundation to roughly contoured summits—with this 12th-grader from Colorado.

Did you know that all slugs eat the equivalent of their own body weight each night? Or that some slugs are cannibalistic? Let this 17-year-old from Washington State introduce you (literally) to a banana slug.

Did you that that only about 1 percent of cockroach species are household pests? Or that cockroach blood is usually green? This 17-year-old from Oregon examines these fascinating creatures.

Jellyfish have existed for more than 650 million years—longer than the earliest dinosaurs. Dive in with this Maryland teen for a look at an animal that ranges in size from 1.5 inches to 200 feet wide.