Fiddler crabs never stray far from their burrow. That's why they will do anything to avoid getting caught and measured, as this ninth-grader from Virginia found out.

The work of Gregor Mendel—today known as the "Father of Genetics"—was disregarded by his fellow scientists. Learn how it was rediscovered decades later in this winning essay by a California teen.

Wolves have long been the favorite animal of this eighth-grader from Illinois. Learn how she turned her interest into an insightful experiment about how wolves calm and comfort each other.

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!

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.

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.

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.

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.