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 ...
Readers travel to the depths of the ocean as they learn fascinating facts about what makes fish different from other animals. As readers ...
Some of the most unique animals on the planet are classified as birds. As readers explore this amazing animal group, they discover fun ...
What makes a frog an amphibian and not a reptile or a mammal? Readers discover the answer to this important question as they learn to ...
How do veterinarians help keep our pets healthy? How do police officers and ...
The ancient civilizations that developed in Greece, Rome, Egypt, and China still ...
