Your respiratory system is working with each breath in and out. But it's more complex than just b...

Oxygen is one of the most essential needs for life on Earth, and respiration is how living things...

The horned owl is a deadly hunter with superior vision and hearing. It roosts on high branches at...

Grapes, plums, jams...some tasty things are the color purple. Readers of this bright volume will ...

Every family is different. That's why it's so much fun to spend time with different people and le...

All day long, the human body is sending messages between the brain and other body parts. These me...

As technology improves, scientists find more and more ways to create electricity. Kids might wond...

Young readers are likely familiar with lakes on a basic level, but they may not know key details ...

Every day, people spend money to get the goods and services they need or want. The cash they use ...

From the moment we open our eyes in the morning to the time we turn out the lights at night, ther...

In pictures, polar bears look almost like teddy bears. With their fluffy fur and chubby body, it'...