Secrets of planet Earth. Big illustrated encyclopedia. Malicia D., Soriano J.

Why is polar bears white? Is it true that the mountains are able to move? How are volcanoes erupted and why do some of them call sleeping? What is the difference between a tornado and a hurricane?

In this great encyclopedia there are answers to the most interesting questions. You will learn about how the Earth has formed, get acquainted with the unusual phenomena of nature - from the northern lights to destructive earthquakes and tsunami, you will see how diverse the animal and plant world of the amazing planet on which we live. The encyclopedia is perfectly illustrated and filled with many facts and hypotheses that will be interesting to readers of all ages.