The iconic smiley-faced robot was inspired by the lazy lifestyle of tree-dwelling sloths. You can't call it lazy, though.

From Sri Lanka to Canada with Disney World Florida in between, the whole family will find fun and adventure at these top ...

Sloths, the world's slowest mammal, have been around for 64 million years. Sharyn Alfonsi traveled to Costa Rica to learn more about how they've survived.

Extinction of animals and plants. Read scientific research on the dinosaur extinction, future mass extinctions, and endangered species. What can be done?