The collective work of famous scientists of Great Britain, USA and Canada, in a popular science style, setting out the main facts, theories and hypotheses regarding the Earth's ice ages ("winter of our planet"), as well as the modern distribution of glaciers and permafrost on the globe, the influence of glaciations on climate change and the development of fauna and flora The book is designed for geologists, geographers, teachers of higher and secondary schools and a wide range of nature lovers.