Yesterday I was walking with friends; nothing special, except the topic, one of my friends introduced. He proposed to calculate, how much disk space it would need to store the color information of the smallest cube that can bound the Earth. We took a cube with 1/72 metre side as a pixel. The result we came with was 3.2E+26 bytes, very rough one. It is quite a lot, when comparing it with capacities of modern HDDs, at least the ones, targeted at home/office computer hardware market. And if store that on 200GB drives, the price to be paid for them would be several quintillions dollars range. Too much for our budgets. ;-)