Present that a vine grows in England, and to swim to Greenland and even America it is possible on simple драккаре vikings. A few centuries back it was reality, however after in Europe - and in our country including - became far more cold. People had to study to survive in a new epoch going down in history as a small ice-age.And, it is necessary to say, people very succeeded herein - and heavy weather terms appeared at the same time by an evil and blessing : they вынуждали to invent new technologies, master mainlands, perfect science. This book tells history most difficult, but, maybe, and the most progressive period in history of Europe.The publishing layout of book is stored in the format of PDF A4.