It can seem that the desert ecosystem is devoid of much life. But this Arizona teen found biodiversity just by turning over a few ironwood tree trunks she found in the sand.

By keeping a nature journal, this 16-year-old from Colorado quickly saw how aspens support and sustain biodiversity. Learn more about the most widely distributed tree species in North America.

Bacteria—the oldest, simplest, and most numerous forms of life—can reproduce as often as every 20 minutes. Learn more about their significant role in ecosystems from this 13-year-old from Ohio.

This 13-year-old from Ohio didn't have a great opinion of bees after one caused her to lose a ball game. That changed, though, when she realized how important bees are to the planet.

The one constant in this world is change. Watch Lake Wildwood cycle from man-made lake to lakebed mudflats to marsh and finally back to lake with this 18-year-old from Georgia.

When this 12-year-old from New York came face to face with a house full of cockroaches, he didn't run away. Instead, he got the bug to learn more about these virtually indestructible creatures.

For centuries, Latin America's poison-dart frogs have helped hunters capture their prey. Today, they're also helping scientists combat disease. Take a close (safe!) look at these vividly colored frogs with this 15-year-old student.

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.

Take a nature walk through the fields and wooded areas in the back-hill farm country of New York State with this 15-year-old. But watch out for wild dogs!

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.