Bohemians live in alternative spaces, these are places that are not normally considered suitable for living in. They don't make wealth their priority. Money is only a means of survival, so they can live for their arts/craft/music/literature...etc.
What causes ice-ages? Fluctuations in the amount of insolation (incoming solar radiation) are the most likely cause of large-scale changes in Earth's climate during the Quaternary. In other words, variations in the intensity and timing of heat from the sun are the most likely cause of the glacial/interglacial cycles.
The Ice Age and its effect on Human Migration. By Hans Berekoven. It is now well established that Ice Ages did exist and that the last Ice Age ended approximately 12,000 years ago. We also know that the Asian Continent was at that time populated by nomadic peoples, Hunters and Gathers.