As humans we instinctively fear the dark and the unknown that comes with it. We often imagine monsters lurking in the shadows - watching us, waiting to attack. As children we have night-lights and soft toys to comfort and protect us against these monsters, with a graceful parent to check under the bed every now and then. Once we reach adulthood the monsters change into more realistic things to fear such as burglars or LEGO blocks on the floor, anything that could cause physical harm. Either way we still approach the dark with caution and heightened senses, ignoring the...