Wouldn't it be cool if you could create a rain cloud? Or call cosmic rays into view? Well, you can do both! All you need is an aquarium, a slide projector, dry ice, and a few other easy-to-get supplies.

Dip your toes into the study of salmon habitats with this eighth-grader from Washington State as she researches why there hasn't been a large run in Salmon Creek since the early '90s.

In a 29-gallon fish tank, this ninth-grader from Virginia created a tropical freshwater ecosystem—and then watched how fish that could never meet in nature interacted.

This 12th-grader from Michigan had never seen a single mushroom growing in her yard ... so she was astonished to discover more than 14 different types. Were they new, or had she overlooked them?

Did you know that earthworms migrate during the winter? Find out where they go—and other fascinating details—as this eighth-grader from New York examines their underground world.

Set sail with a team of teachers and scientists studying deep sea vents off the coast of Washington State. Experience the first day of the exciting trip—the sights, sounds, and seasickness.

Follow along as this 12th-grader from Nova Scotia tries to find out why the common periwinkle is able to live in a heavily polluted body of water known as the North West Arm.

Years ago, this 11th-grader from Hawaii relied on dried-up hapu'u fronds to build forts in the rain forest. Today, he knows that the rain forest itself relies on those very same fronds.

"Some plants don't seem to notice the change in weather, but others, like the aspen, have a new outfit for each season," writes this 10th-grader from New Mexico in her winning Young Naturalist essay.

From hot deserts to frozen tundra to underwater caves, archaeological sites can be as diverse as our planet’s environments. See why some evidence from past cultures survives over time and some doesn’t.