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.
Indeed, some now predict that a brutally cold period much like the Little Ice Age that began in the 1200s and ended in the mid-1800s has already begun. There are two intriguing aspects to this claim: 1  The Little Ice Age was likely caused, at least in part, by a relatively quiescent Sun.