This reference work provides detailed lists of the names and titles of Roman emperors from Augustus to Severus Alexander, as well as a chronology of significant historical events, and a…

Some dolphins look as if they are smiling. They talk to each other using clicks, squeaks and whistles, just the way you talk using words. Find out the many ways…

Have you wondered what it's like to be an elephant? They love water. They like to drink it and play in it. They even like to snorkel. Spend some time…

Horses can run very fast and jump really high. They wear shoes on their feet, and they can wiggle their ears. You'll be amazed at all the things horses (and…

When Sid leaves his foster family on their remote island home in search of the mother he doesn’t remember and a brother he’s never met, he’s ill-prepared for the surprises…

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

This work is in the "public…

Have you ever seen a butterfly hatch from a cocoon? That butterfly was once a little caterpillar that ate leaves, grass, flowers and seeds all day long. FInd out how…

Happiness is an emotion people like to feel. If you know what makes you happy, you can be happy more often. Happiness affects how you think and act, and it…