Tell me why, tell me how

An introduction to tornadoes, covering how, when, and where they form, the damage that can be caused by them, and how to prepare for one.

Photographs and easy-to-follow text describe how waves form, explaining the importance of wind and the different kinds of waves.

Provides comprehensive information on chameleons and explains how and why they change color.

Examines the phenomena and scientific principles behind why the sky appears blue.