The truth about sleeping patterns

The little taskbar clock reads 00:57. I told my girlfriend I would have to leave lest I inadvertently drop off on the keyboard and write a 125,000 character thesis on sleep deprivation consisting mostly of the letters G, F and J (again), but actually I feel perfectly alert. Turns out that, according to this excellent article on sleep, your body doesn’t actually make itself feel tired because you need to rest. In reality, you feel drowsy because your circadianrhythm (read: body-clock) wants you off in order to perform some mental housekeeping.