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.
Ice Age. Ice Age 2: The Meltdown. Ice Age 3: Dawn of the Dinosaurs. Ice Age 4(Hopefully):Th4w, coming out 2012. I'm a little depressed with what they are thinking of as a plot right now, but so far, whats been going around is that Manny, Diego, Sid, Scrat, the possums,peaches and (maybe....a BIG maybe...)Buck &Scratte.