In this lively and fun look at the mathematics of networks, Peter Higgins shows that these phenomena-and many more--all share the same deep mathematical structure. Filled with puzzles and other curious mathematical conundrums, this stimulating book offers new insights into such familiar mathematical quandaries as the four-color map, the bridges of Konisberg, and the Postman Problem (what is the most efficient way of delivering your letters, so you get back to your starting point without having traversed any street twice

This book contains information about water, its warming and disappearing

Describes the life cycle, characteristics, habitats, and behaviors of Northern spotted owls, as well as ways to prevent their extinction

Nobody knows exactly how many plants and animals live on the earth. So far, scientists have counted about 260000 different species of plants