For anyone who has pondered the vastness of our universe, the rich variety of our planet, and the endlessly fascinating world of knowledge that surrounds us, National Geographic presents this timely volume, now fully updated and expanded. Exploring a full spectrum of topics, from earth sciences to astronomy, from climate and habitats to human arts and cultures, from ancient history to cutting-edge technology, this meticulously written and extravagantly illustrated book is the ultimate family reference.