For some reason my practically perfect program keeps giving me blank output files, my printer is just sitting there with it's light on and 5 jobs pending not making a sound and definitely not printing, the determinant of a simple vbrational-thingy-matrix refuses to be worked out and the Optics tutorial is no closer to becoming any more legible.
Woe. Such woe.
...
EDIT: Whilst looking around for some equation or other, I came across
this about the Abraham-Minkowski controversy. Unlike some, it's almost as exciting as it sounds.
More fascinating stuff
here, regarding a new theory as to why miscarriages might occur. It seems there'll be a lot of good stuff in the upcoming issue of New Scientist.