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Kids love to ask questions, and this collection has the answers! Full of fun facts about astounding animal varieties, habitats, and abilities of favorite members of the animal kingdom, each second has more for kids to learn! The easy-to-understand answers will keep kids wanting to learn more. This 3-book collection includes Snakes, Lizards, and Crocodiles.

Parenting advice isn't hard to find. There are thousands of books on the subject, as well as a multitude of websites. Much has also been written on the science of child development. What's been lacking, however, are sources of reliable advice that bring together the scientific research and its real-world applications.

The early history of our planet covers such vast stretches of time that years, centuries, and even millennia become virtually meaningless. Instead paleontologists and scientists who study geochronology divide time into periods and eras. The current view of science is that planet Earth is around 4.6 billion years old. The first four billion years of its development are known as the Precambrian period. For the first billion years or so, there was no life in Earth. Then the first single-celled life-forms, early bacteria and algae, began to emerge.