Oil spills can spread for hundreds of miles in water. Animals can die if they eat litter. These are just two of the many ways pollution can ...
How does human behavior affect animals, and what can we do to help animals that are endangered? Readers find the answers to these and other ...
The Shang Dynasty marked the beginning of recorded history in China. This ancient civilization has been studied by historians and ...
The ancient Romans developed a civilization unlike any other. Readers discover what made ancient Rome so unique and how its influence can ...
Which civilization gave us the Olympic Games? It?s ancient Greece, and readers discover this and other fun facts as they explore one of the ...
There was more to life in ancient Egypt than building pyramids and mummifying bodies. Readers explore the complex and unique civilization ...
Alligators, crocodiles, and lizards are all amazing animals, and they are also all reptiles. Why are these cool creatures classified as ...
Lions, elephants, and people may seem very different, and they are in many ways. However, they are also similar in enough ways to classify ...
Insects can be very different, but they all have some important characteristics in common. Readers discover that these shared ...
