Christmas is nearly here, and depending on where you live, the weather is getting colder (unless you are in the Southern Hemisphere, where you are getting ready for the summer). At this time of the year, thanks to Bing Crosby we think of snow on the ground, a red-cloaked Santa Claus, presents, and ornately decorated trees. In fact, Christmas has become very much a celebration of the winter, and even if you are not a religious Christian – or not a Christian at all – its motifs have become a regular part of western life.

