Intelligence isn't limited to humans - the animal kingdom has its own brainy stars. Here are 10 animals that prove just how smart nature can be.

1. Chimpanzees: Our closest relatives can use tools, learn sign language, and outperform humans in memory tests.

2. Dolphins: Bottlenose dolphins have complex social structures, use sonar, and even teach their young survival tricks.

3. Elephants: Known for their memory and empathy, elephants recognize over 30 relatives just by scent.

4. Crows: These birds use tools, solve puzzles, and understand traffic signals to crack nuts.

5. African Grey Parrots: Can identify colors, count objects, and even beat Harvard students in memory games.

6. Octopuses: Each arm has its own mini-brain; they solve mazes and even plan for future needs.

7. Rats: Detect diseases, play hide-and-seek, and navigate complex tasks with surprising efficiency.

8. Pigs: Solve mirror puzzles and follow human instructions - smarter than their messy rep suggests.

9. Bonobos: Use symbolic language, share food voluntarily, and show deep social cooperation.

10. Bees: Communicate via dance, recognize faces, and teach each other new skills.