"Color photos and simple text describe body functions, such as gas, scabs, scars, and sweat"--

Burps can be loud and sometimes even stinky. Everyone burpsÑfrom babies, adults, and even some animals. Take a journey into the body, following air down the es

Cuts and scrapes are no fun, and their end result can be gross. Wounds can leak pus and scabs are often tempting to pull and tear, but these gross by-products o

In this volume, readers learn the different reasons why we cry--whether it's dirt in the air or a really strong emotion. They also learn about the parts of the

Why do people yawn? Is it because we need oxygen? Or do we yawn to cool off our brain? The answer is, scientists aren't totally sure just yet, but they have man