DK secret worlds

Describes the use of codes and code breaking from ancient times to the present.

Explores several types of extreme weather, including tornadoes, thunderstorms, blizzards, and droughts, and looks at the ways in which humans affect the weather of the planet.

Presents an introduction to primates, focusing on apes and monkeys, looking at how they live in the wild, how they fight, feed, get around in trees and on the ground, breed, and raise their families, and examining the ways in which primates resemble humans.

Describes the daily lives and experiences of ancient Roman gladiators.

Color photos, illustrations, and diagrams fill this compendium of facts about space, which covers such topics as stars, black holes, gas giants, space rocks, the Big Bang, and the possible existence of aliens.

Explores the world of insects, discussing what they eat, how they are born, their development and reproduction, and other interesting facets of their lives.

Text and photographs examine the mummies and tombs of ancient Egypt as well as the everyday life there.